The Following Data Show the Total Output for a Firm

The following data show the total output for a firm when different amounts of labour are combined with a fixed amount of capital. Assume that the wage per unit of labour is $10 and the cost of the capital is $50. $$\begin{array}{l}\begin{array} { | l | l | } \hline \text { Lab our per period } & \text { T ot al Output per period } \\\hline 0 & 0 \\\hline 1 & 10 \\\hline 2 & 30 \\\hline 3 & 90 \\\hline 4 & 132 \\\hline 5 & 150 \\\hline\end{array}\\\text { TABLE 7- } 3\end{array}$$
-Refer to Table 7- 3. The average total cost for 150 units of output is approximately

A) 40 cents.
B) 67 cents.
C) $1.50.
D) 80 cents.
E) 33 cents.