Find a ceiling by hand

Set a price on each of the three resources. The page checks whether your prices cover both products, and if they do, works out the ceiling they prove.

Try this. Get the ceiling under $360 without either product going red. Then try to reach $349 — the reason you cannot is chapter 5.

A ceiling is only as good as its worst product. Under-price either one and the number this page would have printed is not a weak claim, it is no claim at all.