A mail-order house uses 16,025 boxes a year. Carrying costs are 46 cents per box a year, and ordering costs are $97. The following price schedule applies. Number of Boxes Price per Box 1,000 to 1,999 $1.35 2,000 to 4,999 1.25 5,000 to 9,999 1.15 10,000 or more 1.10 Click here for the Excel Data File a. Determine the optimal order quantity. (Round your answer to the nearest whole number.) b. Determine the number of orders per year. (Round your answer to 2 decimal places.)