Answer:
Account Billing Cost assigned to Department B = $24,750
Step-by-step explanation:
Given activity and their respective cost drivers
For Account Billing Activity Total cost = $220,000
Cost driver = 4,000,000 lines
Rate per line = $220,000/4,000,000 = $0.055 per line
Provided Actual Activity of both departments
Total lines assigned to Department B = 450,000 lines
Thus Account Billing Cost assigned to Department B = $0.055 X 450,000 lines
= $24,750