; (2) the surcharge provided in section 7(a) with respect to such coins; and (3) the cost of designing and issuing the coins (including labor, materials, dies, use of machinery, overhead expenses, marketing, and shipping). (b) Bulk sales The Secretary shall make bulk sales of the coins issued under this Act at a reasonable discount. (c) Prepaid orders (1) In general The Secretary shall accept prepaid orders for the coins minted under this Act before the issuance of the coins. (2) Discount Sale prices with respect to prepaid orders under paragraph (1) shall be at a reasonable discount. 7. Surcharges (a) In general All sales of coins minted under this Act shall include a surcharge as follows: (1) A surcharge of $35 per coin for the $5 coin. (2) A surcharge of $10 per coin for the $1 coin. (3) A surcharge of $5 per coin for the half-dollar coin. (b) Distribution Subject to section 5134(f) of title 31, United States Code, all surcharges received by the Secretary from the sale of coins issued under this Act shall be paid to the Friends of the Corpus Christi Museum of Science and History for application to general expenses associated with the fulfillment of the mission of the Friends the Corpus Christi Museum of Science and History, including costs associated with— (1) museum operations