Answer the Question on the Basis of the Following Data

Multiple Choice

Answer the question on the basis of the following data: $\begin{array}{cccccc}Quantity &MP of& MRP of &\text{Quantity of}& MP of &MRP of\\of Labor& Labor& Labor& Capital &Capital &Capital\\\hline1 & 15 & \$ 45 & 1 & 8 & \$ 24 \\2 & 12 & 36 & 2 & 6 & 18 \\3 & 9 & 27 & 3 & 5 & 15 \\4 & 6 & 18 & 4 & 4 & 12 \\5 & 3 & 9 & 5 & 3 & 9 \\6 & 1 & 3 & 6 & 2 & 6\end{array}$ Refer to the given data.If the prices of labor and capital are $9 and $15 respectively,at the profit-maximizing level,the firm's total output will be:

A) 38 units.
B) 60 units.
C) 64 units.
D) 27 units.