Tidy Turf,Inc Calculate the Contribution Margin and the Contribution Margin Ratio

Tidy Turf,Inc.provides housekeeping services.The following financial data have been provided. $$\begin{array} { | l | r | } \hline \text { Service Revenue } & \$ 60,000 \\\hline \text { Cleaning Supplies Used } & 21,000 \\\hline \text { Wages Expense } & 20,350 \\\hline \text { Office Rent Expense } & 5350 \\\hline \text { Depreciation Expense- } & \\\text { Machinery } & 550 \\\hline\end{array}$$ Calculate the contribution margin and the contribution margin ratio.(Round your contribution margin to the nearest dollar,and your contribution margin ratio to two decimal places.)

A) $54,650; 91.08%
B) $39,650; 66.08%
C) $12,750; 21.25%
D) $18,650; 31.08%