You are the CFO of a private college. You know that each student attends school for exactly 4 years. Education is expensive. It costs the school 20k per year per student to run the school, but tuition is only 19k. Effectively, you are losing 1k per student per year. You also know that alumni often give back to the school after graduation. Specifically, on average, students make a 10k donation to the school on their 20th anniversary of graduation. The schools discount rate is 6%. Which is the better plan? Ask to give more? Or ask to give earlier?