Only if they are related to the tasks, i don't mean the whole npc, like this.
CapeVillage-Butcher
(@sell)
%100
+40
[@main]
Welcome, how may i help you?\
\
#IF
large $Task(21) 2
small $Task(21) 5
#SAY
<Quest/@_RW_entry>\
#IF
equal $Task(21) 1
#SAY
<Quest/@_RW_entry>\
#IF
#SAY
<Sell Meat/@sell>\...