Abstract: This disclosure is directed to a retrofit coin measuring apparatus installed in a newspaper vending rack, and more particularly a retrofit structure which is electronically actuated. It incorporates a switch which is operated by insertion of a coin into the coin chute, switching on electrical power which is otherwise switched off to preserve battery life. The coin measuring apparatus has a removable retrofit structure which is attached by a lock bar. Inside the coin measuring apparatus, there is a switch which initiates operation of the electronic circuitry to test for bogus coins, to measure the value of the coin, and sum the total value of coins inserted until a price has been paid and to thereafter operate a door mounted on a paper receiving cabinet. The door is provided with a door hook cooperative with a door hook closure device to close and latch after the sale of a paper. After each sale, the electronic circuitry is switched off and is in a dormant state until the next transaction.