My question is: Mary just arrived at the beach. She has 4 times as many towels as Frances does. The total weight of their towels is 60 pounds. If Mary has 24 towels, how much do Frances's towels weigh in ounces? Your thoughts:

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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Frances has 24 / 4 = 6 towels. They have 24 + 6 = 30 towels. Each towel weighs 60 / 30 = 2 pounds. Frances’s towels weigh a total of 2 * 4 = 8 pounds. Frances’s towels weigh a total of 8 * 16 = 128 ounces. The final answer: 128.