Anybody knows how much a full grown angelfish costs at PetLand?

i know they sell full grown ones because they told me, but petland is very far away from where i live, so if any1 could tell me about how much does a full grown angelfish cost will really help me. my tank is 55 gallons and has 6 1.5" tiger barbs + a 3" senegal bichir, i know that the tiger barbs are fin nipers, but i already asked if a ful grown will hold its own against the barbs and they told me yes because the full growns are more aggressive than the baby ones and are more careful