Need help showing work

2. When the local caramel apple store sells caramel apples for $5 they sell approximately 300 a week. When the price of an apple is raised to $7.25 they sell approximately 250 a week. If they have variable costs of $1.50 per apple and xed costs of $20 a week. How should they price the apples to maximize weekly prot (Assume linear demand and cost)? Does your answer make sense? Be sure to use calculus methods and show your work