Question
Management believes that maintenance cost is a mixed cost that depends on machine hours. Use the HIGH LOW method to estimate the variable and fixed components of this cost. Compute the variable component first and round the nearest whole cent. Compute the fixed component second and round off to the nearest whole dollar. These estimates would be closest to: 
 Machine-Hours Maintenance Cost 
 March 3,135 $48,340 
 
April 3,095 $47,993 
 
May 3,133 $48,345 
 
June 3,157 $48,548 
 
July 3,065 $47,733 
 
August 3,076 $47,830 
 
September 3,084 $47,880 
 
October 3,125 $48,247 
 
November 3,098 $48,014 
 Answer:
Variable maintenance cost per hour =$9
Fixed maintenance cost =$ 20,581 
Step-by-step explanation:
Using the a high and low technique, total cost can be analyzed and separated into fixed and variable portion. This analysis helps in the forecast of cost and therefore important for the preparation of budget. 
Variable cost per activity unit 
= (Cost at high activity - Cost at low activity)/ (high activity - low activity) 
Fixed cost = Total cost at high activity - (VC per act × high activity)
So, we can apply the above formula to the given data:
High 3,157 $48,548 
 Low 3,065 $47,733
Variable maintenance cost = ($48,548- $47,733)/(3,157 - 3,065)
 = $9
Fixed maintenance cost = 48,548 - (8.86×3,157)= $ 20,581 
Variable maintenance cost per hour =$9
Fixed maintenance cost =$ 20,581