QUESTION 27 The Maxit Corporation has a standard costing system in which variable manufacturing overhead is assigned to production on the basis of standard machine-hours. The following data are available for July: Actual variable manufacturing overhead cost incurred: $11,310 Actual machine-hours worked: 1,600 hours Variable overhead rate variance $1,710 U Total variable overhead spending variance: $2,310 U The variable overhead officiency variance for July is