Use the Table Below to Answer the Following Question What Is the Average Total Cost at an Output Level

Use the table below to answer the following question. $$\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Units of } \\\text { Output }\end{array} & \begin{array} { c } \text { Total Fixed } \\\text { Cost (dollars) }\end{array} & \begin{array} { c } \text { Total Variable } \\\text { Cost (dollars) }\end{array} \\\hline 1 & 1,000 & 1,200 \\2 & 1,000 & 2,400 \\3 & 1,000 & 3,600 \\4 & 1,000 & 5,000 \\5 & 1,000 & 6,600 \\\hline\end{array}$$ What is the average total cost at an output level of four units?

A) $1,200.
B) $1,400.
C) $1,500.
D) $2,000.