Answer:
Variable overhead variance = $2,550 favorable
Step-by-step explanation:
Flexible budget is that which is that which recognizes the cost behavior and is used for control purpose. It is prepared based on the actual level of activity achieved.
The variable overhead rate variance is the difference between the actual variable overhead cost and the actual hours multiplied by the standard variable overhead rate.
Actual hours of labour should have cost
($30× 850) 25500
but did cost 22,950
Variable overhead variance 2,550 favorable
Variable overhead rate variance = $2,550 favorable
Variable overhead deficiency variance