You can find the dynamic gross energy price in the tariff calculator by scrolling down: Below the SimplyFair tariff table, you’ll find a graph showing the current dynamic energy price for the next 24 hours as well as the historical prices for the past 12 months: https://join.ostrom.de/tariff-plan

The basic fee and grid fees are identical for both tariffs. In the graph, you can see the spot price, to which taxes and charges are added. These taxes and charges are fixed price components, but they vary in the graph because VAT of the spot price is applied.
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​Each month, you'll receive an invoice based on your actual energy consumption. Your consumption data for every hour of the day is collected through your smart meter.
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That means you pay the Ostrom basic fee, grid fees, and the energy price each month, based on when you use electricity.