I need help with the solutions please

Support departments Power Maintenance Departmental activity measures: Estimated usage for the coming year 800k Wh 125 labour hours Departmental costs: Material and supplies (variable) $ 5 000 $ 1 500 Variable labour 1 400 2 250 Fixed overhead 12 000 250 Total Support department costs $18 400 $4 000 Required: 1. (a) Calculate the plantwide overhead rate for Dillon for the coming year using the same method as used in the past. (b) Estimate the overhead cost of an Elite attache case that requires 4 direct labour hours and 5 machine hours in the moulding department, 3 direct labour hours in the component department and 2 direct labour hours in the assembly department. 2. Chris Bowen has been asked to develop departmental overhead rates for comparison with the plantwide rate. The following steps are to be followed in developing the departmental rates: (a) Allocate the total maintenance costs to the three manufacturing departments, using direct method. (b) Allocate the power department costs to the three manufacturing departments, using the direct method. (c) Calculate departmental overhead rates for the three manufacturing departments, using a machine hour cost driver for the moulding department and a direct labour hour cost driver for the component and assembly departments. 3. Estimate the overhead cost of the Elite attache case using the departmental overhead rates. 4. Should Dillon use a plantwide rate or departmental rates to assign overhead to products? Explain your