I had picked up the incorrect printer cartridge for my 1400 series lexmark I did not realize it until I put in the computer and it was not compatable I had picked up for the 2400 instead when I took in to exchange I was advised they would not exchange or refund because the strip was gone but it was in the box but because it was not on the cartridge they would not I have been dealing with wal mart for about 20 years and i do not understand why they would not exc hange that was $21.00 down the drain and I can not use the cartridge they kept the cartridge one in del city off 15th and sooner