RTI Companys master budget calls for production and sale of 18,900 units for $98,280; variable costs of $43,470; and fixed costs of $18,400. During the most recent period, the company incurred $32,900 of variable costs to produce and sell 18,400 units for $85,900. During this same period, the company earned $25,900 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.