Items at a grocery store can be sold in one of two ways. Most fruits, vegetables, meat, and seafood are usually sold by weight (for example, apples cost 99 cents per pound), while other items are usually sold by quantity (for example, table salt costs $1.59 for each box). Not all items are the same price at each grocery store. Also, every week, some items at grocery stores cost less that what it normally would cost (we say that these items are "on sale"), so people would want to go buy them since they don't have to pay as much as they would normally have to get that item. Many grocery stores print a flyer that shows which items are on sale that week. These flyers are then sent to other people in the mail, who would read the flyer and go to the store to buy the items shown in it.