John Bowie is trying to determine the amount to set aside so that he will have enough money on hand in 4 years to overhaul the engine on his vintage used car. While there is some uncertainty about the cost of engine overhauls in 4 years, by conducting some research online, John has developed the following estimates.

Engine Overhaul Estimated Cash Outflow			Probability Assessment
$270			10%
630			30%
750			50%
870			10%

Click here to view factor tables How much should John Bowie deposit today in an account earning 8%, compounded annually, so that he will have enough money on hand in 4 years to pay for the overhaul?