The Following Three Data Points Appear to Be $$\begin{array} { l l } \text { Units } & \text { Costs } \\100 & \$ 500 \\130 & 550 \\160 & 600\end{array}$$

Multiple Choice

The following three data points appear to be: $$\begin{array} { l l } \text { Units } & \text { Costs } \\100 & \$ 500 \\130 & 550 \\160 & 600\end{array}$$

A) a fixed cost
B) a variable cost
C) a step cost
D) a mixed cost