521 A.2d 497 CRH Catering Co., Inc., a Pennsylvania Corporation, Petitioner v. Commonwealth of Pennsylvania, Respondent. Commonwealth Court of Pennsylvania.Argued November 17, 1986 February 18, 1987. Taxation — Burden of proof — Classification — Vending machines — Convenience stores — Sales tax — Tax Reform Code of 1971, Act of March 4, 1971, P.L. 6 […]