Shop price <none>?

[FossilOG]

and also Sell is <none>

Code:

function sell(p: player, i: item, n: number):
    set {_uuid} to uuid of {_p}
    set {_count} to amount of {_i} in {_p}'s inventory
    set {_sell} to {_count} * {_n}
    remove all {_i} from {_p}'s inventory
    set {_beforeBooster} to {_sell}
    set {_boosterAmount} to {_sell} * {booster::%{_uuid}%}
    add {_boosterAmount} to {_sell}
    add {_sell} to {balance::%{_uuid}%}
    set {_beforeBooster} to split("%{_beforeBooster}%")
    set {_boosterAmount} to split("%{_boosterAmount}%")
    if {_sell} = 0:
        send "&a&lShop &8? &7You have no items to sell" to {_p}
        playSound("ENTITY_VILLAGER_NO", {_p})
    else:
        send " " to {_p}
        send "&a&lShop &8? &7You earned &a$%{_beforeBooster}%" to {_p}
        send "&a&lShop &8     &7Your booster gave you an extra &a$%{_boosterAmount}% &7(&ex%{booster::%{_uuid}%}%&7)" to {_p}
        send " " to {_p} #Sell Code

function setShop(slot: integer, player: player, amount: integer, item: item, name: string, lore: strings, sell: number, buy: number):
    set {_uuid} to uuid of {_player}
    set {_buyMoney} to split("%{_buy} * {_amount}%")
    set {_sellAmount} to split("%{_sell}%")
    add "&aPrice: " and "&a* &fBuy Price (x%{_amount}%): &a$%{_buyMoney}%" to {_lore::*}
    if {_sell} = 0:
        add "&a* &fSell Price (ea): &cNot Sellable" and " " to {_lore::*}
    if {_sell} >= 1:
        add "&a* &fSell Price (ea): &c$%{_sellAmount}%" and " " to {_lore::*}
    if {_sell} >= 1:
        format gui slot {_slot} of {_player} with {_amount} of {_item} named {_name} with lore {_lore::*} to run with "right" click:
            sell({_player}, {_item}, {_sell})
    format gui slot {_slot} of {_player} with {_amount} of {_item} named {_name} with lore {_lore::*} to run with "left" click:
        set {_money} to {_buy} * {_amount}
        if {_player} has enough space for {_amount} of {_item}:
            if {balance::%{_uuid}%} >= {_money}:
                give {_player} {_amount} of {_item}
                remove {_money} from {balance::%{_uuid}%}
                set {_show} to split("%{_money}%")
                send "&a&lShop &8? &7You bought items that costed &a$%{_show}%"
                playSound("ENTITY_VILLAGER_YES", player)
            else:
                send "&a&lShop &8? &7You do not have enough money to buy this item" to {_player}
                playSound("ENTITY_VILLAGER_NO", player)
        else:
            send "&a&lShop &8? &7You do not have enough space to buy this item" to {_player}
            playSound("ENTITY_VILLAGER_NO", player) #Buy Code

I tried changing but made more errors