Enfamil Gentlease Infant Formula

I am selling all 10 cans of Enfamil Gentlease for $100 never been use had 17 cans for $170 sold 7 in have 10 left.I thought my baby would do well on it because at first he was doing great on it and I purchased them thinking he was going to drink them cause he can eat lol but about 3 weeks of him on it he started to have stomach issues so I had to try him on a different milk and I hate for all this money to be to Waste that I purchased these cans for they’re not cheap I tried to take it back to the store that I purchased them from but they told me they couldn’t accept them because I didn’t have a receipt. I’ve been looking for the receipt and I can’t find it having a newborn baby and having four other kids I don’t know where that receipt is at

Condition

Used (normal wear)

Brand

Enfamil