It is possible to add a define value to every transaction like zeny
ex:
My code
+10% increase buy amount of zeny to all shop NPC
+5% increase to all Quest NPC that need zeny.
example increase:
1.
prontera,x,y,x, shop tool 111,501:1000;
when you talk to this Shop NPC the red potion value is 1,000z since i put the code above example it should be increase by 10% it would be 10,000z ? it will happend to all Shop .