A sanitation worker collects trash from 4 routes per week. Route A takes 3.5 hours, Route B takes 2.75 hours, Route C takes 4 hours, and Route D takes 3.25 hours. How many total hours does the worker spend on all routes per week?
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A
13.5 hours
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B
13 hours
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C
14 hours
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D
12.75 hours