You see the following fields:

Lead Time: Enter the number of days it takes this vendor to fill an order for this item.
Rating: Enter a one- to three-character vendor rating code that you designate to classify this supplier. You can use this field to select the suppliers to include in the Suppliers Report.
Last Cost: Enter the dollar cost per item you paid on your last purchase from this vendor.
Discount %: Enter the standard discount percentage you receive when you order this item from the supplier, if any. You can change the discount when you enter a purchase order for this item.
Last Received: Enter the last date you received this item from this vendor.
Minimum Order: Enter the minimum number of units to order from this supplier. This value is in the purchase unit of measure. For example, if an item has a purchase factor of 10, entering a 1 here indicates that you must order a minimum of one set of 10 from this supplier.
Order Increment (In supplier units): If you order this item in specific multiple-unit sets, enter the number of units in each set. Like the previous field, this value is in the purchase unit of measure. For example, if an item has a purchase factor of 10, entering a 2 here indicates that you order in increments of two sets of 10, or 20 stock units.
On Order: This fields displays the number of units on order from this supplier. The system updates this number as you enter orders in Purchase Orders.
Total Receipts (In stock units): Enter the total quantity of this item you have received to date from this vendor in the unit of measure by which you stock the item.
After entering information about the vendor, click Save.