I'm so sorry, Mel, that you have to deal with this. I'll be happy with whatever you decide. I think it would be easy to cover up with a touch of paint, but I understand others being unhappy that it is wrong.
Sorry, I don't want to misrepresent the owner here. I don't think he was ambivalent, but more trying to figure out how to deal with a $2600 order that just went horribly wrong. He also wanted some time to try to find a way they might be able to fix the shirts.
If we could receive a small discount I think that would be fair. However, I am also fine if we don't get anything. If the owner shaves something off the order for the inconvenince that is too small or insignificant to split among the number of shirts ordered, I would be all for Mel keeping it to nominally compensate her for all of her time, effort and energy on this order.
In the grand scheme of things, is it worth it to make Mel do all the exta work? I think not! As someone pointed out, if it took Mel 3 checks to actually spot the error, it can't be that significant. Forgive me for this, but Dr Phil always asks "Do you want to be right or do you want to happy?" Happy wins everytime.