💡 Detailed Explanation
The correct answer is 「経費」 (keihi), which refers specifically to business expenses/operating costs. 「費用」 (hiyō) is a general word for 'costs/expenses' for any activity. 「代金」 (daikin) is the price paid for purchasing goods. 「料金」 (ryōkin) is the fee paid for services (e.g., electricity, train).