Russo Corp produced 21,000 units of fans last November. The load base that was used is $34.25 per machine hour. The following information was obtained about variable production costs during the period: What is the indirect variable manufacturing overhead spending variance? Group of response options A) $3,600 unfavorable B) $3,600 favorable C) $3,325 unfavorable D) $3,325 favorableReallyPlanProduction21,000 pcs24,000 pcsMachine hours13,300 hours14,400 hoursVariable production cost per machine hour$34$34.25.