The following information is available for brownstone products company for the month of july: actual master budget units 3,700 4,000 sales revenue $ 57,600 $ 60,000 variable manufacturing costs 10,200 16,000 fixed manufacturing costs 12,100 13,400 variable selling and administrative expenses 6,700 8,000 fixed selling and administrative expenses 8,200 9,500 required: 1. What was the master budget variance for july? was this variance favorable or unfavorable? 2. Compute the july sales volume variance and the flexible-budget variance for the month, both in terms of contribution margin and in terms of operating income. 4. Prepare pro-forma budgets for activities within its relevant range of operations. Prepare a flexible budget for each of the following two output levels: a. 3,800 units. B. 4,200 units