Grinzaid Home Nursing specializes in home nursing services. It bases its overhead on the flexible budget cost function of $33,000 + ($2.40 × labor hours).
Normal volume is based on 12,000 labor hours. Standards call for 2 labor hours per patient visited.

For the current period, the operating results were as follows:

How much of the budget variance is due to variable costs?

Actual labor hours worked Patient visits Actual variable overhead costs Actual fixed overhead costs 11,400 5,800 $28,460 $31,950