Outdoor Gear Corporation manufactured 1,000 coolers during October. The following variable overhead data relates to October: Variable overhead spending variance Variable overhead efficiency variance $2,464 Unfavorable $189 Unfavorable 607 machine hours Budgeted machine hours allowed for actual output Actual cost per machine hour Budgeted cost per machine hour Calculate the actual machine hours used by Stark during October. A. 616 hours B. 607 hours C. 598 hours D. 615 hours $25 $21