Answer:
d. $86,400.00 
Step-by-step explanation:
The computation of the total materials handling cost allocated to the prefab barns is given below:
Total Materials Handling Cost is $228,300 
 Total is 
= 6600 ×860 + 9600 × 360
= $5,676,000 + $3,456,000
= $9,132,000 
 Allocation Rate = Total Materials Handling Cost ÷ Total direct labor hours 
= $228,300 ÷ $9,132,000 
= $0.025 
 Now 
Total Materials Handling Cost allocated to prefab barns is 
 = Allocation Rate× direct albor hours for Modular Homes
= $0.025 × $3,456,000 
= $86,400