Speedy Racer Corp. presently sells 18,000 motor homes per year at $40,000 each, and 6,000 luxury motor coaches per year at $55,000 each. Company wishes to introduce the new portable camper to fill out its project line; it hopes to sell 12,000 of these campers per year at $10,000 each. independent consultant has determined that if Speedy Racer introduces new campers, it must boost sales of its existing motor homes by 5,000 units per year, and decrease sales of its motor coaches by 2,000 units per year. Determine the amount to use as annual sales figure when estimating this project? Why?