Viger 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: Budgeted level of activity 8,200 MHs Actual level of activity 8,400 MHs Standard variable manufacturing overhead rate $ 6.90 per MH Actual total variable manufacturing overhead $ 55,610 What was the variable overhead rate variance for the month