Help solving 34 and 35

A business received an offer from an exporter for 20, 000 units of product at $15 per unit. The acceptance of the offer will not affect normal production or domestic sales prices. The following data are available: Domestic unit sales price $21 Unite manufacturing costs: Variable 12 Fixed 5 What is the differential revenue from the acceptance of the offer? $300, 000 $420, 000 $120, 000 $240, 000 A business received an offer from an exporter for 10, 000 units of product at $17 per unit acceptance of the offer will not affect normal production or domestic sales prices. The data area available: Use for the next three problems. Domestic unit sales price $20 Unit manufacturing costs: Variable 11 Fixed 1 What is the differential revenue from the acceptance of the offer? $200, 000 $170, 000 $130, 000 $140, 000