Pretax but will add in discounts so it will be a % of 85, e.g. $13 at 15%, $15 at 18%, $17 at 20%, $19 at 22%.

If I have to pay my tip before I am served anything, usually it’s between 50 cents and 10% if at all. More or less I treat it like being nice to a panhandler in the shape of a business. If the establishment earned more through good service, I’ll drop some change or a fiver on my way out.