I think I might have this question correct but I'm not fully sure about it so I wanted to come here and have someone else also try and give it a shot to see if I'm doing something wrong. Please someone help guide me through this problem. Everything required for the problem has been attached here, there's nothing else for me to include to solve the problem.

The following standards for variable manufacturing overhead have been established for a company that makes only one product: Standard hours per unit of output Standard variable overhead rate 6.4 hours $ 12.80 per hour The following data pertain to operations for the last month: Actual hours Actual total variable manufacturing overhead cost Actual output 2,650 hours $34,570 150 units What is the variable overhead efficiency variance for the month? Multiple Choice o $22.292 o $21.632 U $650 L O $12.298 F