Jacoby Company received an offer from an exporter for 28,500 units of product at $18 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 $25 Unit manufacturing costs: Variable $12 Fixed $3 What is the differential revenue from the acceptance of the offer? a. $712,500 b. $513,000 C. $199,500 d. $1,225,500