Products in invoice

I want to choose products from my inventory when life issue an invoice with each price and not go to write off to put the products that I sell. Is this possible? And to take summaries about them?

When you create invoice you can choose the Inventory - sales account and pick a product from inventory. This will automatically write off the number of products in stock. Another way is when you have defined Sales invoice items which can be coupled to many accounts like Sales, for products you sell but do not have in stock (e.g. services).

Thank you very much!!!