During the calendar month (billing period) you buy fuel at stand prices. At the end of the billing period, the payments will be settled and the difference between the "BENZINA totem price" at the time of the transaction and the "BENZINA announced price" valid at the time of the transaction reduced by your discount will be credited to your Tankarta (your customer account).
On 1 February 2021, you will refuel 20 litres of Efecta Diesel at the BENZINA filling station. The totem price, which you will see directly at the filling station, is CZK 29.90 per litre.
You will pay 20 * 29.90 = 598 CZK with Tankarta.
On this day, the announced price was CZK 30.10 per litre. Your discount is CZK 1.50 per litre. Your discounted price with Tankarta is therefore 30.10-1.50 = 28.60 CZK per litre. When buying 20 litres, it is 20 * 28.60 = 572 CZK.
Because you paid more at the gas station on 1 February 2021, at the beginning of March you will receive a cashback in the amount of the difference to your Tankarta.
Cashback amount: 598-572 = 26 CZK