4. You've decided to sell sweatshirts for the upcoming game. You proect that at a price of $31.24 per sweatshirt, you will be able to sell 120 shirts. In order to sell 350 sweatshirts, you would need to lower the price to $14.45 per sweatshirt. In order to produce the sweatshirts, it costs you $2.75 per sweathshirt on top of fixed costs of $320. What price should you charge in order to earn a profit of $2800. Assume linear demand.

You should charge a price of $ per sweatshirt in order to earn a profit of $2800. (IF THERE IS MORE THAN ONE CORRECT ANSWER SEPERATE BY COMMA)