Adobe LiveCycle Designer Help

I am editing a form in Adobe Designer that was created using an older version of Acrobat. It has a table with lots of drop-down lists and a bunch of different items to select from. When an item is selected, it populates a "Unit" in one column, and a "Unit Price" in another. The prices have changed recently and I am trying to find out how to change the Unit Price only. Any advice is greatly appreciated!