jacoby company received an offer from an exporter for 20,300 units of product at $19 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 unit manufacturing costs: variable $12 fixed $5 what is the differential revenue from the acceptance of the offer? a.$385,700 b.$812,000 c.$40,600 d.$426,300