4. A company currently sells 9,820 motor homes per year at $45,500 each, and 3,680 luxury motor coaches per year at $89,700 each. The company wants to introduce a new portable camper to fill out its product line. It hopes to sell 4,000 of these campers per year at $14,750 each. An independent consultant has determined that if the new campers are introduced, sales of its existing motor homes will most likely increase by 250 units per year while the sales of its motor coaches will probably decline by 368 units per year. What is the amount that should be used as the annual sales figure when evaluating the portable camper project?