Kronstedt Corporation has a standard cost system in which it applies manufacturing overhead to products on the basis of standard machine-hours (MHs). The company has provided the following data for the most recent month:
- Budget Level of Activity....... 6,100 MHs
- Actual Level of Activity....... 6,300 MHs
- Cost formula for variable overhead cost.... $6.70 per MH
- Budgeted fixed manufacturing overhead cost.... $42,000
- Actual Total variable overhead.......... $41,580
- Actual total fixed manufacturing overhead.... $45,000
What was the variable overhead rate variance for the month?