when I scanned the display for the multipack ink desired I located the section of the display for my choice. I reached for the multipack checked out and when I returned home I opened then realized I picked a package in the next lower numbering group. Returned to the store seeking an exchange explaining my situation. The clerk said not an issue and started the transaction but ran into a "what or how do I do the next step to keep the Staples coupon discount. A second person responded to her call for assistance and completed the transaction described. Finalizing the exchange the first clerk checked the receipts to confirm all the steps were correct. I left the store realizing it was one of the better experiences over the many years of shopping Staples in my former and current state of residents.