The Maxwell 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: $35,010 Actual machine-hours worked: 1,050 hours Variable overhead rate variance: $4,560 Unfavorable Total variable overhead spending variance:$6,880 Unfavorable The standard number of machine-hours allowed for July production is: 1,170 hours 1,070 hours 1,740 hours 970 hours