Hi, economic and physical allocation factors are not meant to be entered manually but they are meant to be calculated, economic factors from prices; either enter prices as economic flow property for a flow (which is then used for all processes where the flow appears), or enter costs and prices in the process inputs/outputs sheet; these prices are then used only in this process, and they are used even if prices for the flow (entered with the first approach) exist.
Hope this is useful!
Andreas