Outdoor Gear Corporation manufactured 2,000 coolers during October. The following variable overhead data relates to October Variable overhead spending variance $1,857 Unfavorable Variable overhead efficiency variance 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. 599 hours B. 609 hours OC. 618 hours OD. 619 hours $280 Unfavorable 609 machine hours $31 $28