So this sweet old lady orders 2 lattes and a banana bread. No sweat, right? I tell her, ok it was 11 ish dollars, we took of one drink, that's 7.56 please!

Her: no, that's incorrect (*Karen mode activated*)

How much does a latte cost?! ... 3.95$ before tax.
And there's two of those?!... Yes, so at least 8$.
And a banana bread?!.... 3.15$ before tax, so a little under 12 $ for everything before we apply the discount.

So it should have been about 11$ before the discount?! .... Yes, and so now it's 7.56$

Her: oh. Ok. You confused me by saying 11$.

Ok, really lady? You're going to accuse me of over charging you, cop an attitude, have me verbally walk you through the receipt holding up the whole line. Argue with me about the prices when you don't know how much two lattes and a pastry cost, then blame me for your cheapness? If you come back tomorrow and get one drink and a pastry, it will still be 8$. Today you're getting 2, because that's how happy hour works. Just take your drink and go. I'm not lying, you watched me do the discount, you're probably wasting more gas money than anything else.