Overlooked Sarcasm

I think it's kinda funny and pretty awesome that the three of us (me, Allison, Kate) are all friends on blogger like we were on LJ. I'm pretty sure almost no one else reads what I write now, just like then.

To bring up work again, the other day I was trying to help this family of mother, father, daughter. The father asked me if we had "rebbing." I thought he just had an extremely thick accent, and he had to repeat himself a few times. I floundered for about a minute before I realized he was saying "red bean." Then I also realized he had barely any accent when he said "What's so hard to understand about that??" as if he were asking me and his family, in order to include all present in acknowledging my shocking stupidity. I actually didn't try to hide my anger when I sarcastically replied, "I'm sorry sir, I didn't get it." Allow me to lay it out:
1. The cafe/ice cream parlor I work at is pretty much the whitest place in the neighborhood. We do not carry red bean ice cream.
2. We do not carry so many ice creams that it would be impossible to find what you're looking for. At least look before you ask.
3. If I can't understand you, please help me out by speaking up or enunciating properly.

As far as school goes, my education seems to be going in a positive direction, at least as far as I'm concerned. I wish I could hurry up and get to the more advanced classes already, but I don't want to miss anything. I don't mind dicking around too much in the meantime.