dor quotes a price of $1.80/piece. If she orders 2,001-5,000 pieces, the price drops to $1.60/piece. 5,001-10,000 pieces brings the price to $1.40/piece, and 10,001 and above reduces the price to $1.25. Lisa's order costs are $200 per order, her annual holding costs are 5%, and the monthly demand is 3750 pieces. For the best option: a. What is the optimal order quantity given the discount levels