To Follow Is Information About the Units Produced and Total

To follow is information about the units produced and total manufacturing costs for Snow Enterprises for the past six months. $$\begin{array} { | l | c | c | } \hline \text { Month } & \text { Number of units produced } & \text { Total manufacturing costs } \\\hline \text { January } & 7,940 & \$ 5,900 \\\hline \text { February } & 7,500 & \$ 5,460 \\\hline \text { March } & 6,400 & \$ 5,000 \\\hline \text { April } & 6,600 & \$ 5,500 \\\hline \text { May } & 4,740 & \$ 5,100 \\\hline \text { June } & 7,800 & \$ 5,840 \\\hline\end{array}$$
- Using the high-low method,what is the variable cost per unit?

A) $0.74
B) $0.25
C) $1.08
D) $4.00