(a) Any vending machine operator which is a nonprofit, charitable, or educational organization is a consumer of, and shall not be considered a retailer of, tangible personal property which sells at retail for fifteen cents ($0.15) or less and which is actually sold through a vending machine.
(b) Any library district, municipal library, or county library and any vendor making sales pursuant to a contract with a library district, municipal library, or county library is a consumer of, and shall not be considered a retailer of, photocopies which it sells at retail and which are actually sold through a coin-operated copy machine located at a library facility.