The high and low levels of activity are 90,000 miles in April and 50,000 miles in February. The costs at these two levels are $195,000 and $120,000, re-spectively. The difference in costs is $75,000 ($195000-120000), and the difference in miles is 40,000 (90000-50000). Therefore, variable cost per unit is $1.875computed as follows.
75000÷40000=1.875
Determine the fixed costs by subtracting the total variable costs at either the high or the low activity level from the total cost at that activity level
Variable cost=1.875×50,000=93,750
fixed cost=120,000−93,750=26,250