Refer to the exhibit.
SP, a manufacturing company, uses a standard costing system.
The standard variable production overhead cost is based on the following budgeted figures for the year:
During the month of September, 5,300 actual hours were worked and 5,600 standard hours of output were produced. Total variable production overhead costs in September were $8,600.
What was the variable overhead efficiency variance in September?
A . $450 adverse
B . $650 favorable
C . $650 adverse
D . $450 favorable
Answer: D