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Luis Consulting started the year with total assets of $60,000 and total liabilities of $17,000. During the year, the business recorded $48,000 in consulting revenues and $36,000 in expenses. Luis made an additional investment of $8,000 and withdrew cash of $9,000 during the year. The owner's equity at the end of the year was O $33,000 O $54,000 O $57,000 O $63,000