Destroy not a valid member of a folder??

It's for a basic inventory system but it won't destroy the Folder when you run out of (insert object here) Here's the code

local item = script.Parent.Parent.Item
local quan = script.Parent.Parent.Quantity
local player = game.Players.LocalPlayer

script.Parent.MouseButton1Down:connect(function ()
	if item.Value ~= " " then
		local obj = game.ReplicatedStorage.ITEMS:FindFirstChild(item.Value):clone()
		obj.Parent = player.Backpack
		if quan.Value > 0 then
			quan.Value = quan.Value - 1
		elseif quan.Value <= 0 then
			script.Parent.Parent:Destory()
			end
		end
end)

All I get in the output is "destroy is not a valid member of Folder". But I haven o clue hwy as I never had this error when trying to rid of something before? Any help?