The Following Data Show the Total Output for a Firm

Multiple Choice

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.
TABLE 7-3
-Refer to Table 7-3.The average total cost when producing 90 units of output is approximately

A) 27 cents.
B) 30 cents.
C) 33 cents.
D) 89 cents.
E) $26.67.