Return on investment can be given by
[tex] \frac{Profit}{Cost\ of\ goods\ sold} \times100\%[/tex]
Given that the profit is $12,000 and sales is $45,000. Thus, the cost of goods sold is given by $45,000 - $12,000 = $33,000.
Therefore, the return on investment is
[tex] \frac{12000}{33000} \times100\%=36.36\%[/tex]
