Finally. Dont consider the supermarket your friend. They are your enemy, trying to get as much money out of you as they can. The way the shops are laid out are all designed to get you to spend more money.
Examples are placing all the "key" items all over the shop (bread, milk, meat, fruit etc) to get you to walk round the whole shop and see all their offers.
Also placing the fruit etc right at the entrance so you think it is a nice healthy clean environment. Buying fruit and vegetables at the START of your shopping is NOT the best time to do it as you put all the other food on top, do it at the end.
They also place certain items at eye level to encourage you to buy them, and place the "budget" brands right at the bottom of the shelf to discourage you to buy them.
They also put "budget" or "saver" products in bland packaging to make it seem you are a skinflint if you buy them. Hence you are more likely to buy the more expensive brand and they make more profit.
The layout, design, packagaing etc of supermarkets and their products is no accident it is a science, and these companies will do all they can to get you to spend more and more money.
Dont be lured by them.