A project with an initial cost of $31,700 is expected to provide cash flows of $12,450, $12,800, $15,900, and $10,400 over the next four years, respectively. If the required return is 8.7 percent, what is the project's profitability index?

a) .753

b) 1.218

c) 1.329

d) 1.107

e) 1.495