The static budget, at the beginning of the month, for Onyx Dcor Company, follows: Static budget: Sales volume: 1 comma 400 1,400 units; Sales price: $ 70 $70 per unit Variable costs: $ 32 $32 per unit; Fixed costs: $ 37 comma 800 $37,800 per month Operating income: $ 15 comma 400 $15,400 Actual results, at the end of the month, follows: Actual results: Sales volume: 990 990 units; Sales price: $ 75 $75 per unit Variable costs: $ 35 $35 per unit; Fixed costs: $ 33 comma 300 $33,300 per month Operating income: $ 6 comma 300 $6,300 Calculate the flexible budget variance for sales revenue