Tax 11.05(4)(a)(a) Section 77.54 (9a), Stats., exempts sales to and the storage, use or other consumption of tangible personal property and items and property under s. 77.52 (1) (b) and (c), Stats., and services by Wisconsin or by any agency of Wisconsin, the University of Wisconsin Hospitals and Clinics Authority, the Wisconsin Aerospace Authority, the Wisconsin Economic Development Corporation,