Bank na RPG

Witam. Chciałbym poprosić o pomoc dotyczącą skriptu na Bank.
 

on rightclick:
    open chest with 1 rows named "&e&lBank" to player
    wait 2 ticks
    format slot 0 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 1 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 2 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 3 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 4 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 5 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 6 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 7 of player with 1 of 160:15 named " " with lore "" to be unstealable
    format slot 8 of player with 1 of 160:15 named " " with lore "" to be unstealable

Jest to mój skript na bank ( jest on na "sucho" [ już dałem tam itemy, które chce ]). Chciałbym, żeby przedmioty, które np. dam 1 slot 5 kosztował 2500 i po kliknięciu LPM lub PPM zakupić go za określony hajs (czyli 2500). W slot 8 dodać księge, w której będzie można zobaczyć aktualny stan konta.

Oczywiście za pomoc dam Lajka