Use the Above Table and Assume a Fixed Cost of

$$\begin{array} { c c c c c c c } & \text { Variable } & \text { Total } & & & & \text { Marginal } \\\text { Output } & \text { Cost } & \text { Cost } & \text { AFC } & \text { AVC } & \text { ATC } & \text { Cost } \\1 & 400 & & & & & \\2 & 700 & & & & & \\3 & 1,000 & & & & & \\4 & 1,400 & & & & &\end{array}$$ Use the above table and assume a fixed cost of $1000.
-At an output of 4,ATC is

A) $250.
B) $400.
C) $600.
D) $800.
E) $1,000.