When available from your carrier, ShipLeap Momentum will show 3 different prices. Rate, List, Retail. While these 3 terms mean something different for each carrier, the general description of these rates are as follows:
Rate = the actual price/shipping cost (this is the amount you pay to the carrier)
List rate = the rate (non-negotiated) that you get when you have an account with the carrier
Retail rate = the retail rate is the "in store" rate given with no account
For more questions on how the rates are calculated, you may need to talk to your carrier directly and ask about the API pricing you get.
If the prices that appear do not match what you expect, contact your sales person for that carrier and ask them about your API pricing. We don't control the pricing that is pulled from your account. We merely display whatever appears on your account.