A companys master budget for October is to manufacture and sell 30,900 units, for a total sales revenue of $288,000, total variable costs of $167,490. and total fred costs of $25,800. The company octually manufoctured and soid 32.900 units, and generated $54,000 of operating income in Octobet, The sales volume variance, in terms of operating income, for October was: (Do not round intermediate calculations.)