Help Save & Exit Sub CHE Dubberly Corporation's cost formula for its manufacturing overhead is $30,600 per month plus $64 per machine hout. For the month of March, the company planned for activity of 7,900 machine-hours, but the actual level of activity was 7880 machine-hours. The actual manufacturing overhead for the month was $558,610 The spending variance for manufacturing overhead in March would be closest to 12:22 Multiple Choice $22.410 $22,690 F 0 520.000 U O $22.410