Sam's Swimming Pool Cleaning has a annual net income of $46,900. Sam charges $25 per week for each of his customers for 52 weeks. His annual operating expenses, including labor and supplies, are $48,000. How many customers does Sam's Swimming Pool Cleaning have?

Sam needs $46,900 of net income after paying $48,000 in expenses, so his annual revenue must be $46,900 + $48,000 = $94,900. Each customer pays $25 × 52 = $1,300 per year. Dividing $94,900 by $1,300 gives 73 customers, so the correct choice is 73.

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