Sunny's Frozen Treats Is a Snow Cone Stand near the Local

Sunny's Frozen Treats is a snow cone stand near the local park.To plan for the future,Sunny wants to determine his cost behavior patterns.He has the following information available about his operating costs and the number of snow cones served. $$\begin{array} { | l | c | c | } \hline \text { Month } & \text { Number af snow cones } & \text { Total operating costs } \\\hline \text { January } & 7,200 & \$ 4,700 \\\hline \text { February } & 8,000 & \$ 5,800 \\\hline \text { March } & 6,000 & \$ 4,600 \\\hline \text { April } & 6,600 & \$ 4,500 \\\hline \text { May } & 7,700 & \$ 5,100 \\\hline \text { June } & 7,250 & \$ 5,000 \\\hline\end{array}$$
-The variable cost per snow cone using the high-low method is:

A) $1.67.
B) $0.73.
C) $0.77.
D) $0.60.