yummy catering uses two measures of activity, jobs and meals

Yummy Catering uses two measures of activity. jobs and meals, in the cost formulas in its budgets and performance reports. The cost formula for catering supplies is $400 per month plus $100 per job plus $20 per meal. A typical job involves serving a number of meals to guests at a corporate function or at a host's home. The company expected its activity in December to be 10 jobs and 120 meals, but the actual activity was 4 jobs and 103 meals. The actual cost for catering supplies in December was $3,140. The spending variance for catering supplies in December would be closest to