The following information is available for Brownstone Products Company for the month of July: Actual Master Budget Units 3,900 4,000 Sales revenue $ 55,500 $ 60,000 Variable manufacturing costs 20,800 16,000 Fixed manufacturing costs 14,000 13,700 Variable selling and administrative expenses 9,500 8,000 Fixed selling and administrative expenses 10,900 10,400 Required: 1. What was the total operating income variance for July