You are offered a deal to buy an oil well. It produces annual output as follows: 500, 500, 500, 500, 450, 400, 350, 300, 250, 200, 150, 100, 50, 0. What is the total discounted cash flow assuming a discount rate of 10%?
a) $3,845.46
b) $4,228.99
c) $3,632.15
d) $4,510.75