1. Opening Stock: Closing stock of the previous year becomes the opening stock of the current year which is available on the opening day of new accounting period. However, there will no opening stock in case of newly opened business. It is available in the trial balance that must be debited to the trading account. Opening stock may include the raw materials, work-in-progress as well as finished goods.2. Purchases and Purchases Returns: Purchases of raw materials or resale goods made during the year are debited to trading account. Both cash and credit purchases are taken into consideration. Purchase returns are deducted from purchases to find out the figure of net purchases.3. Purchase expenses: All the expenses that are incurred to bring the goods or materials upto warehouses are purchase...