The need for support department cost allocation is virtually being eliminated due to: O a. the move toward activity-based costing and just-in-time manufacturing. O b. the complexity in determining the extent of support department interaction with production departments. O c. the cost-benefit perspective in choosing an allocation method. O d. the usage of multiple charging rates to allocate costs of production departments. mega, Inc., projects t ixed costs (salaries, machine oil): $100,000 per year ariable costs (cleaning supplies): $2.50 per maintenance hour f the total estimated usage of the Maintenance Department is 20,000 hours, calculate a single charging rate decimal places.) O a. $7.50 per hour O b. $3.00 per hour O c. $1.50 per hour O d. $5.25 per hour he following costs for its Maintenance Department for the coming year. for the Maintenance Department. (Round your answer to t