Assume the Following Total Cost Schedule for a Perfectly Competitive

Assume the following total cost schedule for a perfectly competitive firm. $$\begin{array} { | c | c | c | } \hline \text { Output } & \text { TVC } ( \$ ) & \text { TFC } ( \$ ) \\\hline 0 & 0 & 100 \\\hline 1 & 40 & 100 \\\hline 2 & 70 & 100 \\\hline 3 & 120 & 100 \\\hline 4 & 180 & 100 \\\hline 5 & 250 & 100 \\\hline 6 & 330 & 100 \\\hline\end{array}$$ TABLE 9- 2
-Refer to Table 9- 2.At what price would a profit- maximizing firm earn zero economic profits?

A) $70
B) $220
C) $40
D) $430
E) $145