You expect that a project will bring in $15,000 USD in revenue per year. You estimate it will cost $10,000 up front. You also estimate costs of $100 per month for the first 12 months, which equals $1,200 per year. Using the formula (G-C) Ă· C \= ROI, how would you calculate the project's return on investment (ROI) after the first 12 months?
a. (15,000 - 11,200) Ă· 15,000 \= 25%
b. (15,000 - 11,200) Ă· 11,200 \= 34%
c. (15,000 - 10,000) Ă· 11,200 \= 45%
d. (11,200 - 10,000) Ă· 15,000 \= 8%