In the following travel guide I stumbled upon the following phrase:
Art and shopping: Two adults allow at least $35
I can guess that it means that you should take at least $35 if you go to the place or that it's an average minimum for shopping at the place.
But the question is that I don't understand wording of the pharse. Who allow what? Does it have the special meaning which I don't know?
When it comes to signage, alerts, advisory notes etc, certain rules of grammar are ignored. This is the case in most languages and cultures.
"Allow" in this context means to budget for an average or expected amount of money.
If it were to be explained grammatically it would probably say:
You should allow for a minimum spend of $35 per two adults.
It is abbreviated because it is in place of a cost. If something had a very specific price, rather than an estimate like this, you would expect to see something like:
Tickets - $35
... which we understand means "tickets cost $35 each".
