Calculate the equivalent annual cost in years 1 through 9 of the following series of disbursements. Use an interest rate of 10% per year.
10 9 8 7 6 5 4 3 2 1 Year
55 60 65 70 75 80 85 90 90 90 Cash flow
A. $ 424.49
B. $ 404.49
C. $ 434,49
D. $ 414.49
"NPV = 90\/1.1 + 90\/1.1^2 + 90\/1.1^3 + 85\/1.1^4 + 80\/1.1^5 + 75\/1.1^6 + 70\/1.1^7 + 65\/1.1^8 + 60\/1.1^9 = 465.57."
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