The meal plan at University A lets students eat as much as they like for a fixed fee of $500 per semester. The average student there eats 250 lb of food per semester. University B charges students $500 for a book of meal tickets that en-titles the student to eat 250 lb of food per semester. If the student eats more than 250 lb, he or she pays extra; if the student eats less, he or she gets a re-fund. If students are rational, at which university will average food consumption be higher?