The short answer is, you cannot and should not.
Leverage has no impact on fees.
Position size is what dictates fees, and leverage has no impact on your position size.
In the video above I explain how for any given Stop Loss, there's only one position size that corresponds to the correct account risk - this is all independent of Leverage.
I also show the impact of fees when scalping while explaining why position sizes must be so much larger when trading smaller timeframes due to much smaller stop losses.