My mum has told me about her shopping habits in the 70s, she would have a list of everything they needed, she would walk around the first shop writing all the p

My mum has told me about her shopping habits in the 70s, she would have a list of everything they needed, she would walk around the first shop writing all the prices down. She would walk around the second shop buying the items that were cheaper, then return to the first shop to buy what was cheaper there.