The following data is available regarding X Company' utility cost in 2017: Estimated production 3,000 units Budgeted fixed costs $13,000 Budgeted total variable costs $20,820 Actual production 2,600 units Actual total costs $24,941 What was the flexible budget variance for total utility costs in 2017 (assume that a positive number means a favorable variance and a negative number means an unfavorable variance)?