As a former drive who still hangs around the DD/UE subs here, general consensus is a few things. $2 per mile, or nothing under a $6-8 pay range for the order for a "reasonable" distance (which really depends on your market TBH it seems)

Your tips sound good, and I would have taken your orders (well not Walmart... but that is a different story all together when it was DD who did them!)

But there are a couple other things to keep in mind also esp if you are using a platform and not just say.. ordering from Pizza Hut or Papa Johns (who btw.. actually do use DD/UE to delver also..) and the main one is WHERE you are ordering from. 95% of Taco Bells, Popeyes, Arby's, you could offering me and many others a $50 tip for 3 miles and it won't get picked up. If you order from somewhere because the staff is so horrible you don't want to go yourself... tip even more! I say this as someone who has had to argue and yell to get staff to give me food at fast food places, and once was even told by a manager that I would have to wait until every single person who came in AFTER me to pick up and wasn't a delivery would order (4 of them...) , and get their food before they would hand me the already packed bags with a milkshake melting.