The Following Figure Gives the Total Product of Labor at Different

Multiple Choice

The following figure gives the total product of labor at different levels of labor use per day.The market price of the product is $10 per unit and the market wage rate is $8 per day.


$$\begin{array} { c | c } \begin{array} { l } \text { Labor } \\\text { Employed }\end{array} & \begin{array} { l } \text { Total Product } \\\text { (in units) }\end{array} \\\hline 4 & 17 \\5 & 20 \\6 & 25 \\7 & 28 \\8 & 30\end{array}$$
-Refer to Table .The marginal product of labor is the highest when the firm hires _____ workers.

A) 5
B) 6
C) 7
D) 8