well it wasnt just about pay, it was about the experience as well.cant you just text them back, and ask how much they paying?
but yea, to answer your question. when they were filming "panther" out in oakland like 20 years ago my whole family was extras in that moviethey made my dad bring his own dashiki and they paid him $100 (he had a line). my grandma did not have a speaking line, she got $50.