Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

Exercise 21

The alternatives shown are to be compared on the basis of a perpetual (i.e., forever) equivalent annual worth. At an interest rate of 10% per year, the equation that represents the perpetual AW of X1 is:
a) AW X1 = -50,000(0.10) - 10,000 + 13,000(0.10)
b) AW X1 = -50,000(0.10) - 10,000 + 13,000( A / F ,10%,3)
c) AW X1 = -50,000(0.10) - 10,000 - 37,000( P / F ,10%,3)(0.10) + 13,000(0.10)
d) AW X1 = -50,000( A / P ,10%,3) - 10,000 + 13,000( A / F ,10%,3)