Answer:
$90,400
Explanation:
Calculation to determine Cost of operating mining department
Using this formula
Cost of operating mining department= Direct Cost + Payroll cost allocated
Let plug in the formula
Cost of operating mining department= 80,000 + (26,000/130)*52
(52+78=130)
Cost of operating mining department= 80,000 + $10,400
Cost of operating mining department= $90,400
Therefore Cost of operating mining department is $90,400