Supplies Valid in-store only. Offer valid through 09/13/18 - 09/22/18 in Staples U.S. stores only. ExcludesGraphing Scientific Calculators, =aper, Ink Toner,MYSTEMKits, Digital Curriculum, Technology, Computers,Tab=ets, Monitors, Postage Stamps, Gift Cards, Food,Cleaning Breakroom Suppli=s, Printers, 3