Morning Dove Company manufactures one model of birdbath, which is very popular. Morning Dove sells all units it produces each month. The relevant range is 0-1,500 units, and monthly production costs for the production of 1,200 units follow. Morning Dove's utilities and maintenance costs are mixed with the fixed components shown in parentheses. Production Costs Direct materials Direct labor Utilities ($140 fixed) Total Cost $ 1,900 6,700 580 Supervisor's salary 3,200 Maintenance ($320 fixed) 540 Depreciation 850