Set message as a number then add it into a function

[wrymain]

So i want to make a buy feature where the player type their own numbers via message, the function work properly but i cant make the message part work. i'm stuck with this code:

#Buy Function
function buy(p: player, amount: number, price: number, item: item):

    if {_price} > balance of {_p}:
        send "&cYou don't have enough money!" to {_p}
        stop
        
    else:
        remove {_price} * {_amount} from balance of {_p}
        give {_amount} of {_item} to {_p}
        send "&7You bought %{_amount}% %{_item}% for $%{_price}%" to {_p}

#Defining {_message}
on chat:
    set {_message} to message

#Creating the GUI
on load:
    create a new gui with id "reworkshop" with virtual chest inventory with 2 rows named "reworkedshop" and shape "xxxabcxxx" and "xxxdefxxx":
        make gui slot "a" with dirt named "Blocks":
            open gui with id "blocks" for player

    create a new gui with id "blocks" with virtual chest inventory with 2 rows named "Blocks" and shape "xxxabcxxx" and "xxxdefxxx":
        make gui slot "a" with dirt named "Dirt":
            create a new gui with virtual chest inventory with 1 row named "Buy or Sell" and shape "xxxaxbxxx":
                make gui slot "a" with dirt named "Buy":
                    create a new gui with virtual chest inventory with 1 row named "Buy" and shape "xaxxbxxcx":


                        #The Button for 1 stack
                        make gui slot "a" with dirt named "Buy 1 Stack":
                            buy(player, 64, 1, (Dirt))

                        #The Button for 1 item
                        make gui slot "b" with dirt named "Buy 1":
                            buy(player, 1, 1, (Dirt))

                        #The Button for custom to type the amount
                        make gui slot "c" with oak sign named "Custom":
                            close player's inventory
                            send "&7Type the amount of items you want to buy."
                            if {_message} is a number:
                                cancel event
                                add {_message} parsed as number to {_amount}
                                buy(player, {_amount}, 1, (Dirt))

                    open the last gui for player
            open the last gui for player

#The Command to open the GUI
command /reworkshop:
    trigger:
        open gui with id "reworkshop" for player

i was going to make it via sign but too much work.

 

[Meggy_Mode]

you can use parsed as number

 

[wrymain]

you can use parsed as number

i figure that but where do i put it?

edit: already did that in if message a number condition

 

[Meggy_Mode]

idk its your code

 

[Meggy_Mode]

I was reading thru it, and why do you not have definitions for some of the item slots? also you already have parsed as number in your code