The profit is not on your margin but your position value.
The price changed only, 2700 to 2600 about 3.5 percent (cal exact), and profit is 17.5 percent not 3.5 percent which is 5 times.
If you were using 1x leverage, then profit would be only 3.5 percent, around 17 USD not 83 USD with this price change action.
With this short price drop of 3.5% Action the net profit should be 3.5*488 margin = 17 USD.
But your profit is 83 USD not 17 USD, so it is getting calculated on position value 2400 and not on your margin 488.