I currently have Sage 50 in my business. Sometimes a sale invoice is produced before the new item is received into inventory mainly because my customers want to make a payment on the item. When I do the sales invoice it puts my inventory into a negative and it produces the COGS to be zero. Then when i put in the purchase invoice the item in the sales invoices COGS still stays at zero. So therefore when looking at the sales invoice I sold the item for a profit but it didn’t.cost anything which was wrong . My profit should be the difference from the sale minus the cost. Do I need to go back adjust these or do they adjust themselves in the income statement or am I reporting the wrong figures. Please help