Compost Company makes a single product and Uwes utandard costing Variable manufacturing overhad is assigned to production on the basis of direct labour hours. Some data concurring this product for the month of May follow ents F TE F Labour rate variance Labour officiency variance Variable manufacturing overhead efficiency variance Number of units produced Standard labour rato per direct about hour (D) Standard variable manufacturing overhead rato per DLL Actual labour hours used Actual variable manufacturing overhead cost $7,000 $12.000 50.000 110.000 512 154 14,000 $53.290 ary aktion What was the total standard cost for variable manufacturing and for May? 540,000 568.000 $80.000 550.000