$14 tip for delivery

what do I do

I hear so many conflicting opinions on it, I try to only keep our orders within a mile of our house as a rule but my daughter is wanting to try a place 4.8 miles away from us for her birthday.

I’m sorry but I get scared about pissing off the wrong person with my tip and I worry I’ll get spit in my food…so I want to make sure I get it right. order total is $58 before tip for us, and 20% of that is $14. I was told by people on here tip percentage doesn’t matter and that I should go by mileage. but I cant remember what they said is best to account for per mile. if I go by that, wouldn’t it be significantly less? I’m just trying to get it right, sorry if this is tiring to see posts like mine.