Harry Company's standard variable overhead rate is $6.00 per direct labor hour, and each unit requires 2 standard direct labor hours. During March , Harry recorded 6,000 actual direct labor hours, $37,000 actual variable overhead costs, and 2,900 units of product manufactured. What is the total variable overhead variance for March for Harry? a.) $2,200 U b.) $600 U c.) $1,200 U d.) $1,000 U