Suppliers extend a variety of different discounts to their customers. Many vendors offer quantity discounts: the more units you buy, the less you pay per unity. These discounts can apply to individual purchases or to a specific group of purchases made over time, as you would make under a blanket order. Suppliers also offer seasonal discounts that apply to merchandise being sold out of season. The danger with buying off-season goods is that they may go out of style or become obsolete, and never go back "in-season." Vendors also offer cash discounts that you earn by paying the entire invoice within a specified time period. If you received an invoice with the notation "1/10, Net 30," it would mean that you could take a one-percent discount from the net amount of the invoice if you paid within ten days. You would otherwise have to pay for the entire amount of the invoice within 30 days.