on rightclick on entity:

    if entity's name is "상점":

        open chest with 1 rows named "상점" to player

        set slot 1 of current inventory of player to Diamond pickaxe named "도구상점"

        set slot 2 of current inventory of player to End crystal named "pvp상점"

        set slot 3 of current inventory of player to Barrier named "후원상점"

        set slot 4 of current inventory of player to Redstone named "회로상점"

        set slot 5 of current inventory of player to Diamond named "광물상점"

        set slot 6 of current inventory of player to Barrier named "전리품상점"

        set slot 7 of current inventory of player to Wheat named "농장상점"

on inventory click:

    if name of current inventory is "상점":

        cancel event

        if "%index of clicked slot%" is "1":

            open chest with 3 rows named "도구상점" to player

            set slot 10 of current inventory of player to elytra named ""

            set slot 11 of current inventory of player to firework rocket named ""

            set slot 12 of current inventory of player to experience bottle named ""

            set slot 13 of current inventory of player to Shulker box named ""

            set slot 14 of current inventory of player to ender eye named ""

            set slot 15 of current inventory of player to ender chest named ""

            set slot 16 of current inventory of player to enchanting table named ""

제가 여기까지는 했는데 판매하고 구매하는 구문을 모르겠습니다 도와주세요ㅜㅜ