Loop 1604 Inc. has prepared a static budget at the beginning of the month. At the en the month the following information is available: Static Budget: Sales volume: 1,000 units: Price $70 per unit Variable costs: $32 per unit: Fixed costs: $37,500 per month Operating Income: $500 Actual Results: Sales volume: 990 units: Price $74 per unit Variable costs: $35 per unit: Fixed costs: $33,000 per month Operating Income: $5,610 Calculate the flexible budget variance for fixed costs. $2,980 F SO $4,500 F $4,500 U