Hand painted heavy duty Tote bags, how much should I charge?

I made a series of 12 Tote bags that are hand painted, meaning each bag is unique. Usually my midsize acrylic paintings, 30"x40", sell for between $1500~$4000. How much should I charge for Tote bags? I can sort of guess how much they can be if they are screen printed editions but these are sort of like original painting but that are in the format of casual commodity item so they should be cheaper. Any recommendations? Please advise. Thanks a million in advance!