A small mail-order company uses 19,500 boxes a year. Holding cost rate is 19 percent of unit cost per year, and ordering cost is $27 per order. The following quantity discounts are available.

Number of Boxes	Price per Box
1,000 to 1,999	$1.20
2,000 to 4,999	1.15
5,000 to 9,999	1.10
10,000 or more	1.05

a. Determine the optimal order quantity. Optimal order quantity boxes b. Determine the number of orders per year. (Round the final answer to 1 decimal place.) No. of orders per year