Opinion by
Before us are the preliminary objections of respondents, the Department of Revenue (Department) and Barton Fields, Secretary of the Department,1 to a class action petition for review filed by Nan S. Smolow (Petitioner) in our original jurisdiction.
*326On September 10, 1987, Petitioner purchased a 1987 Mercury station wagon from Reedman Mercury (Reedman). The list price of the vehicle was $17,256. Reedman, however, accepted as a trade-in another vehicle owned by Petitioner worth $7,745, thereby reducing the sale price of the vehicle to $9,511.00. At that time, Mercury was offering “manufacturers rebates” of $1,000 as an inducement to purchase a Mercury automobile. A Mercury purchaser could either accept the rebate in cash at some time subsequent to the date of sale, or, could assign his right to the rebate to the automobile retailer prior to or at the time of sale. The retailer would then use the “rebate” to reduce the price of the car.
At this time, the Department had a policy which calculated the sales tax upon a vehicle sale without subtracting the “manufacturers rebate” from the price of the vehicle, notwithstanding the form in which the purchaser took the “rebate.” Thus, Reedman calculated the sales tax of six percent upon Petitioners purchase on a sale price of $9,511, for a total tax of $570.66. Had the “manufacturers rebate” been used to reduce the cost of the vehicle to $8,511, the actual amount of sales tax paid would have been $510.66.2
On March 8, 1988, Petitioner filed her class action petition for review in equity on behalf of herself and all others similarly situated. Her petition challenges the constitutionality of the Departments alleged policy of not reducing the price of a vehicle for sales tax purposes by the amount of a “manufacturers rebate” used at the time of sale by the purchaser to reduce the price of ve*327hide. This policy assertedly violates both the equal protection clause of the fourteenth amendment of the United States Constitution and the uniformity clause of the Pennsylvania Constitution, article VIII, section 1. In her six-count petition she seeks both on behalf of herself, and the class she seeks to represent, refunds (counts I and IV), injunctive relief and/or a writ’ of mandamus restraining the Department from continuing its policy (counts III and VI), and treble damages under the Unfair Trade Practices and Consumer Protection Law (Law)3 (counts II and V). The Department filed preliminary objections asserting that Petitioner had failed to exhaust her administrative remedies, that she had an adequate remedy at law, and that her suit was barred by sovereign immunity.
It is well settled that preliminary objections in the nature of a demurrer admit all well-pleaded material facts in the pleading as well as all reasonable inferences deducible therefrom and cannot be sustained unless it is clear on the face of the pleading that the law will not permit recovery. E-Z Parks, Inc. v. Larson, 91 Pa. Commonwealth Ct. 600, 604 n.4, 498 A.2d 1364, 1367 n.4 (1985) , aff'd per curiam, 509 Pa. 496, 503 A.2d 931 (1986) . However, the pleaders conclusions or averments of law are not considered to be admitted as true by way of demurrer. Madden v. Jeffes, 85 Pa. Commonwealth Ct. 414, 482 A.2d 1162 (1984). In ruling on preliminary objections, this Courts decision must be based solely on the facts averred in the petition.4 Jamieson v. Pennsylva*328nia Board of Probation and Parole, 83 Pa. Commonwealth Ct. 546, 478 A.2d 152 (1984).
The relevant statutory provision here is Section 201(g)(1) of the Code, which defines “purchase price” in part as:
The total value of anything paid or delivered, or promised to be paid or delivered, whether it be money or otherwise, in complete performance of a sale at retail or purchase at retail, as herein defined, without any deduction on account of the cost or value of the property sold, cost or value of transportation, cost or value of labor or service, interest or discount paid after the sale is consummated, and other taxes imposed by the Commonwealth of Pennsylvania or any other expense except there shall be excluded any gratuity or separately stated deposit charge for returnable containers.
72 P.S. §7201(g)(l). Further, 61 Pa. Code §33.2(d)(2) provides:
(d) Items excluded from purchase price. The following items are excluded from the purchase price.
(2) Discounts. Discounts such as on-the-spot cash discounts, employe discounts, volume discounts and wholesalers or trade discounts which *329in effect establish a new sales price may be deducted in computing the purchase price.
Petitioners constitutional theory here is that because the Department failed to recognize that a “manufacturers rebate” which is assigned to an automobile dealer at the time of sale to reduce the “purchase price” of a motor vehicle is a discount, she ended up paying an effective sales tax rate of 6.7 percent on her purchase, while other persons who bought vehicles worth $8,511 (without the rebate) only paid a sales tax of six percent, see Section 202 of the Tax Reform Code of 1971 (Code).5 Thus, she argues that the tax was nonuniform and violative of article VIII, section 1 of the Pennsylvania Constitution.6
In order to confer jurisdiction upon an equity court in a tax matter, a petitioner must show the existence of a substantial question of constitutionality (not a mere allegation of it) and the absence of an adequate statutory remedy under the circumstances. Borough of Green Tree v. Board of Property Assessments, Appeals and Review of Allegheny County, 459 Pa. 268, 328 A.2d 819 (1974) (plurality opinion); Rochester & Pittsburgh Coal Co. v. Indiana County Board of Assessment and Revision of Taxes, 438 Pa. 506, 266 A.2d 78 (1970). A petitioner is required to satisfy both prongs of this test because the mere presence of a constitutional issue does not necessarily render a statutory remedy inadequate. Myers v. Department of Revenue, 55 Pa. Commonwealth Ct. 509, 423 A.2d 1101 (1980); Hudson v. Union County, 50 Pa. Commonwealth Ct. 378, 413 A.2d 1148 (1980). See also Scott v. Palmerton Area School District, *33063 Pa. Commonwealth Ct. 528, 439 A.2d 859 (1981), aff'd per curiam, 502 Pa. 431, 466 A.2d 1209 (1983). A statutory remedy is inadequate only if it either (1) does not allow adjudication of the issue raised by the petitioner, or (2) allows irreparable harm to occur to the petitioners during the pursuit of the statutory remedy. LCN Real Estate, Inc. v. Borough of Wyoming, 117 Pa. Commonwealth Ct. 260, 270 n.8, 544 A.2d 1053, 1058 n.8 (1988). In Green Tree, our Supreme Court indicated that the type of constitutional question sufficient to allow the exercise of a courts equitable jurisdiction is that which goes directly to the validity of the taxing statute involved. See also Lashe v. Northern York County School District, 52 Pa. Commonwealth Ct. 541, 417 A.2d 260 (1980); City of Philadelphia v. Kenny, 28 Pa. Commonwealth Ct. 531, 369 A.2d 1343 (1977), cert. denied, 434 U.S. 923 (1977). Even though a taxing body may apply a taxing statute incorrectly, this is insufficient to invoke the equitable jurisdiction of a court. Kenny.
The gravamen of Petitioners action is that the Departments failure to deduct “rebates” used by an' automobile purchaser at the time of sale to reduce the price of a vehicle is contrary to law.7 See paragraph 13 of Petitioners petition for review. She further argues that because the law was applied improperly, all people who *331bought vehicles costing $8,511 were not subject to the same sales tax rate, and thus, the uniformity clause of the Pennsylvania Constitution was violated. Petitioners constitutional argument, however, does not challenge the facial validity of any statute or regulation, a challenge necessary to divest an administrative tribunal of jurisdiction. Myers. Instead, she challenges the constitutionality of the Departments policy as applied. This is insufficient to confer jurisdiction upon this Court. Kenny. We thus find that Petitioners constitutional claim is one the Department is not incompetent to adjudicate.
Petitioner asserts that our Supreme Courts decision in Amidon v. Kane, 444 Pa. 38, 279 A.2d 53 (1971), allows for constitutional challenges on uniformity grounds to the method of computing a tax. In Amidon, our Supreme Court declared the states personal income tax invalid because, “[although the Tax Reform Code of 1971 purports to impose a flat 3Vá% tax upon ‘taxable income,’ the concept of ‘taxable income’ already reflects the federal personal exemptions for the taxpayer and his qualified dependents . . . [t]hus, built-in to the Tax Reform Code of 1971 are exactly the same elements of nonuniformity as were condemned in both Kelley [v. Kalodner, 320 Pa. 180, 181 A. 598 (1935)] and Saulsbury [v. Bethlehem Steel Co., 413 Pa. 316, 196 A.2d 664 (1964)].” Amidon, 444 Pa. at 51, 279 A.2d at 60 (emphasis in original). She points to language in Amidon where the Court (quoting the Allentown School District Mercantile Tax Case, 370 Pa. 161, 170, 87 A.2d 480, 484 (1952)), stated that “where a method or formula of computing a tax will, in its operation or effect, produce arbitrary or unjust or unreasonably discriminatory results, the constitutional provision relating to uniformity is violated.” Amidon, 444 Pa. at 49, 279 A.2d at 59.
Amidon is inapposite, however, because our Supreme Court principally faulted the tax statute itself be*332cause of the scheme whereby taxpayers enjoying the privilege of receiving, earning or otherwise acquiring the same amount of income as others were subjected to varying tax rates depending upon what exemptions to gross income they were entitled to under the federal statutory scheme. Gosewisch v. Department of Revenue, 40 Pa. Commonwealth Ct. 565, 397 A.2d 1288 (1979). Here, by contrast, the sales tax rate of six percent upon the “purchase price” of sales at retail is uniform, see Section 202 of the Code, 72 P.S. §7202; it is the “purchase price” of the vehicle which was miscalculated. Put differently, the Department overassessed the “purchase price” of Petitioners vehicle; thus, this is a situation where equity classically lacks jurisdiction because a statutory remedy is available. Philadelphia Life Insurance Co. v. Commonwealth, 410 Pa. 571, 190 A.2d 111 (1963). All the other cases cited by Petitioner in support of her action involved either direct constitutional attacks on the fecial validity of a taxing statute or the total want of authority on the part of the taxing body either to tax or to levy the tax, situations not present here.8 Having determined that Petitioner has failed to *333exhaust her administrative remedies, we dismiss with prejudice Counts I, III, IV and VI of her petition for review.
Petitioner also avers that the Departments failure to deduct from the vehicles sales price a “manufacturers rebate” assigned at the time of sale to the automobile retailer to reduce the price of the vehicle constituted fraudulent conduct under the Unfair Trade Practices and Consumer Protection Law (Law). Petitioner contends that the Department, by telling people the sales tax was six percent upon all purchases, when, in reality, due to the misapplication of the law, the effective tax rate was higher, made false and misleading statements likely to create confusion and misunderstanding in violation of the Law. The Department contends Petitioners claims based on the Law are barred by sovereign immunity. We agree. The relevant statute is 1 Pa. C. S. §2310, which provides:
Pursuant to section 11 of Article I of the Constitution of Pennsylvania, it is hereby declared to be the intent of the General Assembly that the Commonwealth, and its officials and employees acting within the scope of their duties, shall continue to enjoy sovereign and official immunity and remain immune from suit except as the General Assembly shall waive the immunity. When the General Assembly specifically waives sovereign immunity, a claim against the Commonwealth and its officials and employees shall be brought only in such manner and in such courts and in such cases as directed by the pro*334visions of Title 42 (relating to the judiciary and judicial procedures) unless otherwise authorized by statute.[9]
The above-quoted provision is unambiguous; unless sovereign immunity has been specifically waived, the legislature intends that it remain in effect. Poliskiewicz v. East Stroudsburg University, 113 Pa. Commonwealth Ct. 13, 536 A.2d 472 (1988). We can find nothing in the Law to indicate that the legislature has specifically waived the defense of sovereign immunity in the type of action brought here. Accordingly, we dismiss counts II and V of Petitioners petition for review with prejudice on the basis of sovereign immunity.
Order
Now, September 8, 1988, the preliminary objections of the Department of Revenue and Barton Fields are hereby sustained and Petitioners petition for review is hereby dismissed with prejudice.