Two twelve-year-old boys were seriously injured when riding on a go-kart. The boys were riding on public streets, ran a stop sign, and were hit by a car that did not see them. The go-kart had clear warning labels on the sides stating that it was only for off-road use only. The manual stated the go-kart not to be used on public streets. The parents sued the go-kart manufacturer. One basic issue in this case would be:

The school cafeteria can make pizza for approximately $0.30 a slice. the cost of kitchen use and cafeteria staff runs about $200 per day. the pizza den nearby will deliver whole pizzas for $9.00 each. the cafeteria staff cuts the pizza into eight slices and serves them in the usual cafeteria line. with no cooking duties, the staff can be reduced by half, for a fixed cost of $75 per day. should the school cafeteria make or buy its pizzas?