a thief is robbing a store that has n items. the ith item is worth dollars, weighs pounds and can be grabbed in time, where , and are integers. he wants to take as valuable a load as possible, but he can carry at most pounds in his knapsack, and can only spend time before the police arrive. which items should he take to maximize the total value? all values involved are integers.

Little's law can be applied to any part of the store, such as a particular department or the checkout lines. the store owner determines that, during business hours, approximately 84 shoppers per hour make a purchase and each of these shoppers spend an average of 5 minutes in the checkout line. at any time during business hours, about how many shoppers, on average, are waiting in the checkout line to make a purchase at the good deals store?