Usually when a group grows to a certain size, somebody will decide that rather than chipping in $30, because they "just had a salad", they'll toss in $12.95 for the salad, skip tax and tip and disappear.
Interesting. In Poland, and most EU places I've been to, the prices in restaurants and stores are almost universally gross, to make it easier for the buyer to know how much they'll pay.
Usually when a group grows to a certain size, somebody will decide that rather than chipping in $30, because they "just had a salad", they'll toss in $12.95 for the salad, skip tax and tip and disappear.