You can use price levels in two different ways:
You can apply a price level directly to
items on a sales form.
You can associate a price level
with one or more customers or jobs.
If you associate a price level with a customer, whenever you create a sales
form for that customer, items will automatically appear with the new amount.
Applicable sales forms are: invoices, estimates, sales receipts, credit memos, or sales
Should I use a discount item instead?
If you want to create a discount that
is not linked to a particular customer or job, you can create
a discount item instead.