FrontGrade Systems allocates manufacturing overhead based on machine hours. Each connector should require 11 machine hours. According to the static budget, FrontGrade expected to incur the following: (Click the icon to view the static budget information.) During August, FrontGrade actually used 1,000 machine hours to make 110 connectors and spent $5,600 in variable manufacturing costs and $8,300 in fixed manufacturing overhead costs. Calculate the variable overhead efficiency variance for FrontGrade. O A. $450 F B. $600 U C. $1,050 F - More Info D. $1,650 F 1,100 machine hours per month (100 connectors x 11 machine hours per connector) $5,500 in variable manufacturing overhead costs $8,250 in fixed manufacturing overhead costs Print Done