Going to a BBQ on Saturday and I'm making a big bowl of guacamole. Ingredients are: avocado, jalapeno, tomato, garlic, cilantro, chili powder, cumin, lime, and salt. Putting sour cream in guacamole is uncivilized.
I try not to ask for change back from a pizza guy, so it kind of depends. In fact, if I'm limited in the amount of change I have on me, I pay by credit card when I order it instead. But your $3 to $5 seems about right.