The Berk 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: $34,830 Actual machine-hours worked: 1,250 hours Variable overhead rate variance: $3,580 Unfavorable Total variable overhead spending variance: $7,705 Unfavorable The standard number of machine-hours allowed for July production is: