Concept:Cost of goods sold is a direct trading expense, while cost of services is an operating expense.Explanation:The trading account records direct costs related to buying and selling goods.Cost of goods sold is therefore debited to the trading account.Cost of services refers to expenses incurred in providing services, not in trading goods.These service-related costs are operating expenses of the business.Such operating expenses are debited to the profit and loss account at the end of the trading period.Answer:Profit and loss account