Im sure we've all seen the adverts for supermarkets being cheaper than others, namely Asda showing its cheaper than the other big 3.
However this begs a question. Lets say for arguments sake that Tesco, Sainsburys and Morrisons sell eggs at £1.50 for a pack of 12. If Asda sell them at £1.25, does that mean the supplier gets less money for what he/she produces?