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During e-commerce shopping cart progression or equivalent, there are points that the InterPayments API needs to be called. When the NICN, Shipping State/Region and Total amount has been entered or modified, it is necessary to call the InterPayments API to retrieve a Transaction Fee (which may be 0.00).

Here are some workflows that are common in Retail Systems.

The following workflow descriptions are available: - basic - multipay - nicn store