In the top part of the panel, enter the currency name or its abbreviation in the Displayed currency unit field.
Use the bottom part of the panel to define the Prices of purchased energy. These prices, of course, vary by location and therefore must be entered numerically by the user. Select the Unit of energy (e.g. kWh) from the dropdown list. Next, select a row representing a source of energy, and then enter the price, in the currency you chose.