The following information is available for Brownstone Products Company for the month of July: Actual Master Budget 4,000 $53,400$60,000 16,000 13,100 8,000 9,200 3,600 Units Sales revenue Variable manufacturing costs Fixed manufacturing costs Variable selling and administrative expenses Fixed seling and administrative expenses 19.200 14,100 7,900 9,300 Required: 1. Compute the July sales volume variance and the flexible-budget variance for the month in terms of both contribution margin and operating income (Indicate the effect of each variance by selecting "F for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values. ) Flexible-Budget Variance Sales Volume Variance Contribution margin Operating income Prepare pro forma budgets for activities within its relevant range of operations and prepare a flexible budget for each of the following two output levels: a. 3,770 units. b. 4,170 units. 3. FlexibleFlexible budget (a.) budget (b.)Budget Master Units Sales Variable costs: 4,000 S 60,000 16,000 8,000 is 24.000 is 36,000 Manufacturing Selling and administrative Total variable costs Contribution margin Fixed costs Manufacturing 13,100 9,200 S 22,300 S13.700 Selling and administrative Total fixed costs Operating income