What do the Supermarkets use spreadsheets for?

What do the Supermarkets use spreadsheets for?
People from almost all occupations and vocations can benefit from using spreadsheets. All major companies and a lot of smaller ones do use spreadsheets. It is useful in budgets, accounting, graphing and a lot of clerical work. Just about anyone can find a use for spreadsheets
Supermarkets use spreadsheets to keep track of finances i.e. sales, losses and money spent. They also use spreadsheets to work out queuing times and what are the best number of checkouts to have open at any one time during the day. They may use spreadsheets to keep track of stock which will help them find stock in the stockroom. Supermarkets may also use spreadsheets to keep track of the items they sell, the value of the items, the profit made on each item and more importantly, the commission they have earned! The might have a list of customers with a club card, and the products they purchase. They might Use it to locate other stores with phone numbers, etc. Or where they can find other stock. List of suppliers with details? When they will begin to sell other products. What days they are open, and what are the most popular times.