Kekai's family is having a garage sale. Kekai sells 5 shirts and 5 pairs of pants. Each shirt sells for $1, and each pair of pants sells for $3. If Kekai gives his parents half of the money he earns from selling his clothes, how much money does Kekai have left? Let's be accurate as possible.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
From selling his shirts, Kekai makes 5 * $1 = $5. From selling his pants, Kekai makes 5 * $3 = $15. The total amount of money Kekai earns is $5 + $15 = $20. Since Kekai gives half of the money to his parents, he has $20 / 2 = $10 left.
The answer: 10.