44. Charles is a self-employed CPA who maintains a qualifying office in his home. Charles has $110,000 gross income from his practice and incurs $88,000 in salaries, supplies, computer services, etc. Charles's mortgage interest and real estate taxes allocable to the office total $10,000. Other expenses total $14,000 and consist of depreciation, utilities, insurance, and maintenance. What is Charles' total home office expense deduction? A) $10,000 B) $14,000 C) $22,000 D) $24,000