Problem $13-16($Algo$)$

The McDonald$$s fast$-$food restaurant on campus sells an average of $8,400$ quarter$-$pound hamburgers each week. Hamburger patties are resupplied twice a week, and on average the store has $435$ pounds of hamburger in stock. Assume that the hamburger patties cost $$1$ a pound and there are $52$ weeks in a year.