The Following Information Is Available for Electricity Costs for the Last

Multiple Choice

The following information is available for electricity costs for the last six months of the year:
$$\begin{array} { l c c } \text { Month } & \text { Production Volume } & \text { Electricity Costs } \\\hline\text { July } & 1,400 & \$ 2,200 \\\text { August } & 2,800 & 5,400 \\\text { September } & 3,200 & 5,700 \\\text { October } & 1,750 & 3,900 \\\text { November } & 1,200 & 2,400 \\\text { December } & 2,100 & 4.050\end{array}$$
-Refer to the figure.Using the high-low method,what is the estimated variable cost per unit of production?

A) $1.26
B) $1.53
C) $1.65
D) $1.75