Tire plug is $15. Tire patch is $20 Install a tube is also $20, plus the price of the tube.
If somebody shows up with a flat tire in the trunk that needs to be replaced, and they want to jack it up and change it themselves after I sell, and mount a new one on their wheel, it's $15, plus the price of the tire. Valve stem, and balance included.
I charge $20 per wheel to mount a tire, replace the valve stem, and balance it, if tires are still on the vehicle.
If I sell a set of four, I charge an hour's labor which is $75, and I'll even wipe off yo' brake dust so my hand prints ain't all over yo' rimps.
4 wheel alignment is also $75, plus any alignment parts like cam kits, shims, ball joint bushings, etc... If there's some chassis damage, but it's still within the adjustment range and I know I can still line it up, I charge however long it takes.