You can populate the list by importing the data from the price lists available from the supplier.
The Supplier Prices (create) form. The Prices tab
To add a row, click the Add button. If you are manually entering the supplier prices, in the Item column select the items for which you will enter the supplier prices. To select multiple items at once, use the Pick button. For details, refer to Using the Pick Operation. Alternatively, you can import the list of items with all the details from an Excel document. For this, click the 
button on the table toolbar and follow the step-by-step instructions in the appeared window.
The Characteristic column is available if the Enable Item Characteristics option is selected on the Administration > Settings > Purchasing and Warehouses form. In this column, you can specify additional properties (such as size, color, and so forth) of each listed item if the Use Characteristics option is selected for the item in its master record (see Items).
In the UOM column, you can select an UOM for the item if the Multiple UOMs per Item option is selected on the Administration > Settings > Purchasing and Warehouses form.
The Currency column is automatically populated with the currency specified for the selected price type.
Check boxes in the А (actual) column are selected by default. If you clear a check box for any item, its price will not be used by the system.
Use the Price column to enter the prices.