Tina's Bar is a popular drinking establishment. Tina charges a fixed nightly cover fee to each customer to get in the door, and then the same price p for every drink. The marginal cost of making a drink is $5. Suppose she gets 50 customers per night and they all have the same nightly demand for drinks: q = 4 - 0.2p.

• What is Tina's per-customer cover charge?dollars
• What price p will she charge per drink?dollars per drink