Sure, the school supplies haven't really jumped in price or gotten out of control, but those clothes and accessories such as backpacks have definitely jumped up. The Increase In School Supply CostsOver the last year, we've seen general school supply prices rise by about 8-11%, which isn't terrible on the surface. Free Backpacks In Amarillo This WeekendWell, Amarillo businesses are fully aware of the increase and know how many people are struggling right now with the way the economy is. Mazda of Amarillo has decided to give back because of that, and free backpacks will be available this Saturday, August 8th. Beginning at 10 am, Mazda of Amarillo is handing out 1,000 free backpacks at their End of Summer event.