Where do I find the restaurant software price before I sign up?

On the pricing page of the Get Menu website, which reads the live prices, so the number you see there is the number you are charged. There are three ways to pay: a monthly plan, the same plans priced for a year with the saving shown, and pay-as-you-go at a small amount per order. VAT is added on top. The POS is a separate yearly add-on and its price is shown once you are signed in, under Settings → Plan & billing. Monthly plans start with fifteen days free and no card, so the honest way to check the price is to try it. The Account, trial & billing tab in the docs explains each track.