The Unit Price that the vendor entered in Gateway may differ from the price that is listed on the invoice. This occurs when the units are shipped on the vendor's account and/or when there is a discount allowance.
The invoice price in CI should follow this equation:
Unit Price (Gateway) + Shipping Cost (Gateway) - Discount Allowance = CI invoice cost
For example, if an item is listed in Gateway with a Unit Price of $12.99, a Shipping Cost of $1.99 and a 4% Discount Allowance, the CI invoice will read $14.38.