advice about a situm the Department be specific when asking for 15. Which of the following statements are true? a. Sales of merchandise to Air Force personnel for use in connection with their Air Force duty are exempt from tax. b. Sales to State Procurement Officers for selective service are exempt from sales tax. c. Sale of sporting equipment to a tank company on an Army post, which was paid for from the company fund, is exempt from tax. d. Purchases of surplus property from the Surplus Property Department are exempt from the use tax as purchases from the United States government. e. Sales of envelopes and stationery to a Federal Savings and Loan Association for use in their home loan department are subject to sales tax