Exhibit 7-7 Cost Schedule for a Firm -In Exhibit 7-7, by Filling in the Blanks It Can

Exhibit 7-7 Cost schedule for a firm $$\begin{array} { | c | c | c | } \hline \text { Quantity } & \text { Total Cost } & \text { Marginal Cost } \\\hline 0 & \$ 200 & \\1 & 900 & \\2 & & \$ 900 \\3 & 3,000 & \\\hline\end{array}$$
-In Exhibit 7-7, by filling in the blanks it can be determined that the total cost of the second unit of output is:

A) 0.
B) 700.
C) 1,000.
D) 1,200.
E) 1,800.