BackFill Systems allocates manufacturing overhead based on machine hours. Each connector should require 10 machine hours. According to the static budget, BackFill expected to incur the following: 1 (Click the icon to view the static budget information.) During August, BackFill actually used 500 machine hours to make 120 connectors and spent $5,000 in variable manufacturing costs and $9,300 in fixed manufacturing overhead costs. Calculate the variable overhead efficiency variance for BackFill. O A $625 U More info OB. $7,250 F O C. $8,500 F OD. $7,875 F 400 machine hours per month (40 connectors * 10 machine hours per connector) $4,500 in variable manufacturing overhead costs $8,525 in fixed manufacturing overhead costs Print Done