How to calculate profit loss in option trading and commodity treading

i want to know about how to calculate profit or loss of 1 point (1 Rs.) move in commodity lot or option lot

i new in trading

The profit/loss will be calculated as 

number of points gained/loss X  lot size - brokerage & other charges

Zerodha has best calculator , you can check in below link

There is lot of brokerage calculator in India to calculate profit and loss. I am using My Value Trade Brokerage Calculator. You can check this also