oh dear, fucking chicken is more expensive than pork now, a single chicken breast costs like 3 usd equivalent now, thighs are like 70us Ct each, I don't eat chicken so I don't pay much attention
if you want cheap you can always buy feetsies and hearts and livers, heh, and the necks, or heads
that stuff is CHEAP
but 400pesos for 20 thighs sounds about right