How am i loosing money in total account value?

Hi,
I have recently added some money to my zerodha account and then I have used about 1/4th of the money for buying some stocks. Now even if after the day I am profitable the total account value shows me a little less than the amount I have added in zerodha. For Eg. I have added 1.9L in my account and then I have used about 54k to buy stocks. After the day has ended I am profitable by 200. Now, the problem is that my total account value is shown as 1,89,974/-. I have lost 26 here. Why is that? Is that the fee taken to process my request? If yes, could you please provide me the details of the fee so that I could calculate it before investing.
Regards.