Winnebagel Corporation currently sells $45,000$ motor homes per year at $$67,500$ each, and $18,000$ luxury motor coaches per year at $$127,500$ each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell $28,500$ of these campers per year at $$18,000$ each. An independent consultant has determined that if the company introduces the new campers, it should boost the sales of its existing motor homes by $6,750$ units per year, and reduce the sales of its motor coaches by $1,350$ units per year.

What is the amount to use as the annual sales figure when evaluating this project?