Table 214 At 4 Units of Output in Table 21

Table 21.4 $\begin{array}{|c|r|}\hline \text { Output (Units per Day) } & \text { Total Cost (Dollars per Day) } \\\hline 0 & 16 \\\hline 1 & 30 \\\hline 2 & 42 \\\hline 3 & 58 \\\hline 4 & 78 \\\hline\end{array}$ At 4 units of output in Table 21.4,total fixed costs are

A) $78.00.
B) $19.50.
C) $16.00.
D) $20.00.