How Do Frito-Lay Products Get to the Store?

Frito-Lay Products
Did you ever think about how these products get on the shelves?

I love potato chips and most other salty, crunchy snacks. Cheetos, Ruffles, Fritos, Kettle Chips, you name it, and I like them. I shop most often at Wal-Mart for my groceries, and I have often noticed the huge row of Frito-Lay products on display. There is also usually a free standing aisle display of Frito-Lay products alongside a Pepsi display. Frito is a subsidiary of Pepsi so this seems logical. Lately I have also noticed that most of the check-out aisles have shelves of single bags of chips in a variety of flavors.

I have gone to Wal-Mart at all hours of the day and have noticed that in the mornings, the shelves are full and very straight. Later in the day, many bags of chips are missing and some of the shelves are a bit dishabille. However, next day things are back in order, the shelves are full, and all is right in the chip world. I thought that perhaps the store had someone, a stock boy or something, who does this job every day, but that is not the case.