Sarah is planning a road trip. She will drive from City A to City B, which is 150 miles away. After reaching City B, she will continue to City C, which is 75 miles further. On her way back, she will stop at City B again before returning to City A. If she drives a total of 450 miles, how many miles did she drive between City C and City B on her way back? Let's think step by step and output the final answer within \boxed{}.
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