Click the "Edit" link in the Action column. Enter the minimum purchase amount to qualify for free shipping. If there is no limit, you can leave this blank. You can also choose to limit free shipping to a specific Geo Zone by selecting one from the drop down menu. For example, if you enter in 50.00 in the minimum order blank and select a Geo Zone set up for Canada, only orders shipped within Canada and over $50 will qualify for free shipping.