Xenon Company makes watches. The fixed overhead costs for 2019 total $648,000. The company uses direct labor-hours for fixed overhead allocation and anticipates 21,600 hours during the year for 540,000 units. An equal number of units are budgeted for each month. During October, 48,000 watches were produced and $52,000 was spent on fixed overhead. Determine the production-volume overhead variance for October.