I would say that this is all very approximate, while the Ethereum network is very dependent on the size of the commissions on the network. If the number of resolved blocks is amenable to a mathematical calculation, then the transaction fees included in the blocks are very changeable and very dependent on the movements of the Ethereum price. Therefore, the calculation of income is significantly different and may change every hour or even half-hour.
Also it depends on typical Forex metrics - day of the week, working day or weekend, time of day
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This earnings calculation for 1 GH/s in ETH