Top menu >> Agencies >> View Agency >> Addendums tab
Product addendums are setup on the agency page >> addendums tab.

Click the Addendums tab.
Click + Add a product addendum.

Select a supplier by clicking on the Supplier's name.

Select a product by clicking on the product's name.

Gross rate: what you receive for the product
Sales rate: the rate you pay your agent for the product.

Enter a Note for staff (internal) or for the agent Note. Optional.