What supermarket is cheaper ; Asda , Morrisons , Sainsbury’s or Tesco’s

In my area there are 4 major supermarkets asda morrisons sainburys and tescos. But i am really unsure of which is cheaper asda claims they are cheaper but should i belive this HELP ME

Hello world!

Welcome to WordPress.com. This is your first post. Edit or delete it and start blogging!