Answer:
a. Monthly Factory Overhead Cost Budget Fabrication Department
Direct Labor Hours             9,000      10,000    11,000
Variable Factory Overhead      $40,500   $45,000   $49,500
Cost at $4.50 per hour
Fixed Factory Overhead Costs   $60,000   $60,000   $60,000
Total Factory Overheads       $100,500  $105,000  $109,500
b. Normal Production = 10,000 Units
Total Factory Overheads = $105,000
Factory Overhead Cost per unit = $105,000 / 10,000 Units
Factory Overhead Cost per unit = $10.5 per unit
Factory Overhead Cost absorbed when 9,000 hours used in the department:
= 9,000 Hours * $10.5 per Unit
= $94,500