I have decided to feed 60 poor people as kaffarah. considering I live in the UK, there are no poor people here and I found out that I can go to charity website where I can pay money and they will do the feeding for me. Also I'm not sure how much bread, wheat and barely costs in the UK and I dont know how much it would be to feed 60 poor people. Could you kindly explain what I should do this situation

You don’t have to feed in UK.
You can do it in your home country, Pakistan or India, where you can ask one of your relatives to feed 60 people, 750gm’s each, and send him the money