This is the cost of raw materials and goods bought for resale which you used during this accounting period. Make sure you count creditors, that is items delivered to you but which you had not paid for at the end of the period. Do not count items you paid for in this period if they were included as creditors in your last accounts. You should include the value of stock you had on hand and uncompleted work in progress at the start of the period (this must be the closing figure which you used in your last accounts), but exclude the value of stock and work in progress.