Dubberly Corporation's cost formula for its manufacturing overhead is $30,600 per month plus $64 per machine-hour. For the month of March, the company planned for activity of 7,900 machine-hours, but the actual level of activity was 7,880 machine-hours. The actual manufacturing overhead for the month was $558,610. The activity variance for manufacturing overhead in March would be closest to Multiple Choice $22,410 UU $22,410 F $1,280 F $1.280 U Prev 1 of 25 Next >