RTI Companys master budget calls for production and sale of 19,900 units for $113,430; variable costs of $57,710; and fixed costs of $18,900. During the most recent period, the company incurred $33,900 of variable costs to produce and sell 18,900 units for $86,900. During this same period, the company earned $26,900 of operating income. (Do not round intermediate calculations. Round final answer to the nearest whole dollar.)

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