This is based on my experience.
18SC Car Wash, will do 4 Car Washes.
What do you plan to clean with the 121 Ultimate Cleaner? Longevity could vary greatly.
330 Mini Buff – Depends on condition of car, fine scratch and swirl coverage, again could vary greatly, but none-the-less you do not need to saturate your pads with this stuff, Will you be using a PC? A little goes a long way.
2180 Ultra Seal, I got four applications out of the sample, again you can layer this stuff and it will effect how may cars you can do with the sample.
108 Top Kote, 3 well applied applications
425 Ultra Slick Poly Wipe Spray Detailer, depends how obsessive compulsive you are, I got 4 applications and this included door jambs including all crevices, trunk and hood areas, preping PC pads for product and, clean-up after Pink Wax.
2685 Pink Wax, the tin may do two cars, again depends on how much you layer.
Hope this helps.