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. 3,750 units. b. 4,150 units. Answer is complete but not entirely correct. Complete this question by entering your answers in the tabs below. What was the master budget variance for July? Was this variance favorable or unfavorable? (Indicate the effect of each variance by selecting "F" for Favorable, "U" for Unfavorable, and "None" for no effect (i.e., zero variance).) 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. (Indicate the effect of each variance by selecting "F" for Favorable, "U" Unfavorable, and "None" for no effect (i.e., zero variance).)