When budgeted usage is the allocation base, regardless of the actual usage of facilities (i.e., whether Case 1, 2, or 3 occurs), user departments receive a preset lump-sum fixed-cost charge as in the dual-rate procedure discussed earlier. If rates are calculated based on budgeted usage at $40 per hour the Machining Department is assigned and the Assembly Department, . If rates are set using practical capacity at $36 per hour the Machining Department is charged the Assembly Department is allocated and the remaining is the unallocated cost of excess capacity.