Tunes Corporation manufactures and sells portable radios. The radio sells for $40 per unit and its variable costs per unit are $20. Fixed costs are $68,000 per month for sales volumes up to 27.000 radios. If more than 27,000 radios are sold, the fixed costs will be $42,000. The flexible budget would reflect what monthly operating income for a sales volume of 42,000 radios? *A. $798,000 XB. $42.000 O C. $1,680,000 O D. $840,000