On top there is Scan, Calculate and Payment. Please rename Scan to Input. Remove calculate. After input has been made to the readings and you press calculate usage, you shall be directed to "Payment". Here there Payment request for Vipps will be available, not in the history. In "Payment" The usage for that month should be shown and also the % of how much usage the tenant is. You will also add manually the electric bill, before pressong "Request payment".