RTI Companys master budget calls for production and sale of 19,200 units for $96,000; variable costs of $42,240; and fixed costs of $21,200. During the most recent period, the company incurred $33,200 of variable costs to produce and sell 21,200 units for $86,200. During this same period, the company earned $26,200 of operating income. (Do not round intermediate calculations. Round final answer to the nearest whole dollar.)

Required: 1. Determine the following for RTI Company: a. Flexible-budget operating income. b. Flexible-budget variance, in terms of contribution margin. c. Flexible-budget variance, in terms of operating income. d. Sales volume variance, in terms of contribution margin. e. Sales volume variance, in terms of operating income.