Adams Entertainment sells souvenir T$-$shirts at each rock concert that it sponsors. The shirts cost $$10$ each. Any excess shirts can be returned to the manufacturer for a full refund of the purchase price. The sales price is $$28$ per shirt.

Required

What are the total cost of shirts and cost per shirt if sales amount to $2,000,2,500,3,000,3,500,$ or $4,000?$

Is the cost of T$-$shirts a fixed or a variable cost?