Check out this link to create your price list if you haven't had one
Setting up default price list for your customer or supplier is quite easy, select your customer/supplier and click Edit, scroll down until you see PRICE LIST field and select price list(s) you want to apply to the customer/supplier. Then click on the CHECK MARK to turn it yellow and you have your default price list for your customer/supplier.
In case you cannot see the price lists when choosing, check if the customer's/supplier's currency matches with the price list you want to choose, if they don't match, you will need to change the currency of the customer/supplier or the price list currency.
For customer's EMERGE Cart, the products prices will be shown as default price list's price only.