Single-rate versus dual-rate methods, support department. The Chicago power plant that services all manufacturing departments of MidWest Engineering has a budget for the coming year. This budget been expressed in the following monthly terms:

The expected monthly costs for operating the power plant during the budget year are $15,000: $6,000 variable and $9,000 fixed.

1. Assume that a single cost pool is used for the power plant costs. What budgeted amounts will be allocated to each manufacturing department if (a) the rate is calculated based on practical capacity and costs are allocated based on practical capacity and (b) the rate is calculated based on expected monthly usage and costs are allocated based on expected monthly usage?

2. Assume the dual-rate method is used with separate cost pools for the variable and fixed costs. Variable costs are allocated on the basis of expected monthly usage. Fixed costs are allocated on the basis of practical capacity. What budgeted amounts will be allocated to each manufacturing department? Why might you prefer the dual-rate method?

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Needed at Practical Capacity Production Level (Kilowatt-Hours) 10,000 20,000 12,000 Average Expected Monthly Usage (Kilowatt-Hours) 8,000 9,000 7,000 6,000 30,000 Manufacturing Department Rockford Peoria Hammond Kankakee Total 50,000