Explain simply why 40 is the correct answer to: Betty picked 16 strawberries. Matthew picked 20 more strawberries than Betty and twice as many as Natalie. They used their strawberries to make jam. One jar of jam used 7 strawberries and they sold each jar at $4. How much money were they able to make from the strawberries they picked?. Explanation:

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
Matthew picked 16 + 20 = 36 strawberries. Natalie picked 36 / 2 = 18 strawberries. All together, they have 16 + 36 + 18 = 70 strawberries. They can make 70 / 7 = 10 jars of strawberries. They earn 10 x $4 = $40 from the strawberries they picked.