How To Make It Save The Cost Of An Item And Save IntValues?

https://cdn.discordapp.com/attachments/447457287376994304/494905176889753610/unknown.png this is the folders

this is the script for the shop

button = game.StarterGui.Shop.Frame.ImageButton
player = game.Players.LocalPlayer
cost = game.ReplicatedStorage.StatFile.LocalPlayer.statnumbers.cost1.Value
add = 1

button.MouseButton1Down:connect(function()
	if player.leaderstats.Money.Value >= cost then
		player.leaderstats.Money.Value = player.leaderstats.Money.Value - cost
		player.leaderstats.MPS.Value = player.leaderstats.MPS.Value + add
		cost = cost + 50
	end
end)


while true do
	wait(0.01)
	script.Parent.Text = "Cost: "..cost
end

also i want it to save the cost the intvalue but im not sure if i have done the datastore correctly

local DS = game:GetService("DataStoreService"):GetDataStore("test")
local StatFile = game:GetService("ReplicatedStorage"):WaitForChild("StatFile")

game.Players.PlayerAdded:connect(function(player)
	local playerFolder = Instance.new("Folder", StatFile)
	playerFolder.Name = player.Name
	
	local statnumbers = Instance.new("Folder", playerFolder)
	statnumbers.Name = "statnumbers"
	
	local cost1 = Instance.new("IntValue", statnumbers)
	cost1.Name = "cost1"
	
	local add1 = Instance.new("IntValue", statnumbers)
	add1.Name = "add1"
	
	local thing = Instance.new("StringValue", statnumbers)
	thing.Name = "thing"
	
	local str = Instance.new("StringValue", statnumbers)
	str.Name = 'str'
	str.Value = 'thisIsAString'
	
	local savedStuff = DS:GetAsync(player.userId)
	
	if savedStuff then
		print('data takes up '..game:GetService("HttpService"):JSONEncode(savedStuff):len()..'/260000')
		for i,v in pairs(savedStuff)do
			print(i,v)
			if i % 2 == 0 then
				StatFile[player.Name].statnumbers:FindFirstChild(savedStuff[i - 1]).Value = v
				
			end
		end
	end
end)

local function saveValues(player)
	local savedData = {}
	for i,v in pairs(StatFile[player.Name].statnumbers:GetChildren()) do 
		savedData[#savedData + 1] = v.Name
		savedData[#savedData + 1] = v.Value
	end
	DS:SetAsync(player.userId, savedData)
end

game:BlindToClose(function()
	for i, player in pairs(game.Players:GetPlayers()) do
		saveValues(player)
	end
end)

game.Players.PlayerRemoving:connect(function(player)
	saveValues(player)
end)

try this :)

local ds = game:GetService("DataStoreService"):GetDataStore("Pillows")
local tbl = {}
local array = 0

game.Players.PlayerAdded:Connect(function(p)
	player = p
	local data = ds:GetAsync(p.UserId)
	local buttons = p.PlayerGui:WaitForChild("Shop").ShopFrame.ShopGui.Buttons
	if data == nil then
		print("Creating new data")
		ds:SetAsync(p.UserId, tbl)
		else
		for _, v in pairs(buttons:GetChildren())do
			if v.ClassName == "TextButton" then
				array = array + 1
				v.Amount.Value = data[array]
			end
		end
	end
end)

game:BindToClose (function()
	local ID = player.UserId
	local buttons = player.PlayerGui:WaitForChild("Shop").ShopFrame.ShopGui.Buttons
	for _, v in pairs(buttons:GetChildren())do
			if v.ClassName == "TextButton" then 
				table.insert(tbl, v.Amount.Value)
			end
	end
	ds:SetAsync(ID, tbl)
end)