Chapter 1, Problem 30DQ

Solve with explanation and accounting

Bloomfield Manufacturing's budgeted variable overheads for a period amounted to $42,000. During this period, the company spent $40,500 on variable overheads. The company's level of production was expected to require 21,000 labor hours, but the actual amount of labor hours used was only 20,250 hours. What was the variable overhead expenditure variance for the period?

I need help finding the accurate solution to this financial accounting problem with valid methods.