Odoo pulls the sale price from the product record to populate the unit price in the line item. It is possible to override the price in the line item. For this example, we will leave the Unit Price at $16.50.
Be careful about changing prices in Odoo line items. It is possible that, if you click back on the Product field or tab through other fields in a line item, the Unit Price will flip back the price in product record. If you are changing prices in the line items, make sure you double-check your unit prices before you confirm your sales order.