A Price List is the collection of all the billable items your winery provides to your contract clients. Depending on your contracts you may have only one price list or multiple price lists at different rates for different customers.
Once your billing items are established use the create your Price List in Winery Setup > Billing > Price List.
Once you given a Code for your price list and selected a Currency you can then start to add the items that will be billed for customers using this list. Clicking Add all items will include every billing item you've configured or you can add them manually one by one with the Add line option.
If you've got a similar price list already configured the Copy from option will allow you to enter the Code of an existing price list. This will then copy all of the billing items and their prices to your new list. You can then modify prices to suit.
Clicking Advanced against an item allows you to set up a minimum price to be charged for this item, override the price lists tax rate and to configure tiered pricing with the Price brackets section