Outdoor Gear Corporation manufactured 5,000 coolers during October. The following variable overhead data relates to October: Variable overhead spending variance Variable overhead efficiency variance Budgeted machine hours allowed for actual output Actual cost per machine hour Budgeted cost per machine hour $1,310 Unfavorable $192 Favorable 615 Machine Hours $27 $24. Calculate the actual machine hours used by Stark during October. 623 hours 607 hours 615 hours 622 hours