Complete the following passage with the words in the box. Each can be used only once.

    But unit price isn't the only thing to consider. Ask yourself how much you exactly need. Food waste is a  problem. According to a research, people throw away up to 40% of the food they buy. So, ask yourself: Do I actually need 8 pieces of bread? If not, the smaller bag is the better .

    Also, brand names come at a cost. Sometimes, what you're paying for isn't just the product in the package. It's the brand name on the package. That's why many stores  their own products which are usually much cheaper. Last year, some supermarkets did a test. They invited people to try some brand-name cakes and  them with those made by the supermarkets. To their surprise, most people thought there was not any difference between them.