Caprice is taking piano lessons. Her mother pays the teacher $10 for every half-hour of teaching her daughter. If Caprice is taking one lesson per week, and the lesson lasts 1 hour, how much money would the teacher earn in 5 weeks? 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.
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If half - hour lesson is worth $10, then a one - hour lesson costs 2 * 10 = $20. One lesson per week would mean that in 5 weeks the teacher would earn 20 * 5 = $100.
The answer: 100.