Cathy Inc. manufactured 115,000 backpacks during February. The variable overhead cost-allocation base is $3.75 per machine-hour. The following variable overhead data pertain to February: Actual Budgeted Production 115,000 units 115,000 units 8,000 hours Machine hours 9,500 hours Variable overhead 4.25 cost per machine hour 3.75 What is the variable overhead efficiency variance? 15.700 favorable 5,000 favorable 5,500 unfavorable 54625 unfavorable