Answer:
$90,000
Explanation:
At the activity level of 20,000 machine hours:
total maintenance costs=20,000* $10.50=$210,000
At the activity level of 24,000 machine hours:
total maintenance costs=24,000*$9.75=$234,000
variable maintenance cost per hour=(total maintenance costs at higher activity level-total maintenance costs at lower activity level)/(higher activity level-lower activity level)
variable maintenance cost per hour=($234,000-$210,000)/(24000-20000)
variable maintenance cost per unit=$6
Using the higher activity level data:
total cost=fixed cost+(variable maintenance cost per unit*number of hours)
$234,000=fixed cost+($6*24000)
234,000=fixed cost+$144,000
fixed cost=$234,000-$144,000
fixed cost=$90,000