Dubberly Corporation's cost formula for its manufacturing overhead is $30,800 per month plus $62 per machine-hour. For the month of March, the company planned for activity of 7,940 machine-hours, but...

Dubberly Corporation's cost formula for its manufacturing overhead is $30,800 per month plus $62 per machine-hour. For the month of March, the company planned for activity of 7,940 machine-hours, but the actual level of activity was 7,900 machine-hours. The actual manufacturing overhead for the month was $545,730.

The activity variance for manufacturing overhead in March would be closest to:?