The following standards for variable manufacturing overhead have been established for a company that makes only one product: Standard hours per unit of output ..... Standard variable overhead rate... 5.6 hours $12.00 per hour The following data pertain to operations for the last month: Actual hours....... 2,600 hours Actual total variable manufacturing overhead cost.. Actual output...... $31,330 400 units What's the variable overhead rate variance for the month?