A small discount retailer of snorkeling equipment must decide how many snorkeling masks to order for this summer season. The selling price for these masks is $20, while the cost to the retailer is only $12. The retailer can usually buy additional masks from competitors at their retail price of $25. Masks left over at the end of the short selling season are sold at a special discount price of $10 per pair. The manager of the store assumes that demand is approximately normally distributed with a mean of 600 masks and a standard deviation of 200 masks.

a. How many should she order?

b. What is the effect on the order quantity if she could reduce the standard deviation to 100?? Lp852