During the Months of January Through June, the Following Total

During the months of January through June, the following total utility costs were paid at various production volumes:
$\begin{array}{lcc}\text { Month } & \text { Total Utility Cost } & \text { Total Production Volume }\\\text { January } & \$ 10,000 & 32,000 \text { units } \\\text { February } & 14,000 & 52,000 \text { units } \\\text { March } & 16,000 & 64,000 \text { units } \\\text { April } & 12,000 & 40,000 \text { units } \\\text { May } & 8,000 & 24,000 \text { units } \\\text { June } & 20,000 & 72,000 \text { units }\end{array}$
a.Use the high-low method to calculate the cost formula utility costs.
b.If the production volume were expected to be 50,000 units for the month of July, what amount of total costs would be expected?