5. A service company's working capital at the beginning of January of the current year was $70,000. The following transactions occurred during January: Performed services on account $30,000 Purchased supplies on account 5,000 Consumed supplies 4,000 Purchased office equipment for cash 2,000 Paid short-term bank loan 6,500 Paid salaries 10,000 Accrued salaries 3,500 What is the amount of working capital at the end of January? A. $90,000 B. $80,500 C. $50,500 D. $47,500