A mail-order house uses 15,800 boxes a year. Carrying costs are 46 cents per box a year, and ordering costs are $94. The following price schedule applies. Number of Boxes 1,000 to 1,999 2,000 to 4,999 5,000 to 9,999 10,000 or more Price per Box $1.30 1.20 1.10 1.05 a. Determine the optimal order quantity (Round your answer to the nearest whole number.) Optimal order quantity boxes b. Determine the number of orders per year. (Round your answer to 2 decimal places.) + Number of order per year