This screen allows you to enter the price change to all the items assigned to the group. Price is NOT the new price, but the amount by which to change the previous price. So, if you want to change the price of all the items in a group, just enter the amount of the change. Depending on your changes, the group price will be added to - or subtracted from - the previous amount. If you want to lower the price use the negative (-) symbol before entering the price group change amount.
Note: You do not have to use the plus (+) symbol to raise prices in a group. The plus symbol is assumed in Backroom for Windows.