Developer Product script not working, and can it be done more simple?

local MarketplaceService = game:GetService("MarketplaceService")
local ds = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
 
First = 35587367 
Second = 35587494 

MarketplaceService.ProcessReceipt = function(receiptInfo)
	local playerProductKey = "player_" .. receiptInfo.PlayerId .. "_product_" .. receiptInfo.ProductId
	local numberBought = ds:IncrementAsync(playerProductKey, 1)
	for i,v in pairs (game.Players:GetChildren()) do
		if v.userId == receiptInfo.PlayerId then
			if receiptInfo.ProductId == First then
				
				local lds = v:FindFirstChild("leaderstats")
				if lds ~= nil then
					local cs = lds:FindFirstChild("Money")
					if cs ~= nil then
						cs.Value = cs.Value + 500
						
					elseif receiptInfo.ProductID == Second then
						
				local lds = v:FindFirstChild("leaderstats")
				if lds ~= nil then
					local cs = lds:FindFirstChild("Money")
					if cs ~= nil then
						cs.Value = cs.Value + 1000
						
					end
				end
			end
		end
	end
	return Enum.ProductPurchaseDecision.PurchaseGranted		
		end
	end
end