Profit calculation

Hi I have been using a demo acct from bit4x 100:1 for a couple months practicing my trading strategy. I am about really to open a real trading account but I am confused about the fees.

Yesterday I went short on gbp/usd

lot of 0.03 @ 1.61065

It dropped to 1.59860

Which is a gain of 120.5 pips

The profit shows $28.73

I am trying to figure out the calculations to come up with this number. I thought the commissions were in the spread but these number don’t add up for me.

3000*120.5=361500

361500//.0001 = $36.15

I figure this difference to be about 20.5% is this their commission?

If so is that a reasonable commission rate? It seems very high

Any help you can offer would be greatly appreciated
Thanks

There are a few threads on here about profit calculation. Try reading them, they should explain what you needs to know. Below to the link to one of them.

http://forums.babypips.com/newbie-island/55957-profit-calculation-lot.html