How would I abbreviate large IntValues?

In tycoon game, the player's cash values are stored in game.ServerStorage.MoneyStorage.(All of the player's name are IntValue and the value is there money). I wrote this script to try and abbreviate it but it doesn't seem to be working, could someone help out? Nothing is underlined or anything and the output window isn't showing anything.

wait(2)

function Convert(num)
local x = tostring(num)
if #x>=13 then
local num1 = (#x-12)
return x:sub(0,(num1)).."."..(x:sub(#x-10,(#x-10))).."Q+" --Quadrillion
elseif #x>=10 then
    local num1 = (#x-9)
    return x:sub(0,(num1)).."."..(x:sub(#x-7,(#x-7))).."B+" --Billion
elseif #x>= 7 then
 local num1 = (#x-6)
 return x:sub(0,(num1)).."."..(x:sub(#x-5,(#x-5))).."M+" --Million
elseif #x>=4 then
    return x:sub(0,(#x-3)).."."..(x:sub(#x-2,(#x-2))).."K+" --Thousand
else
return num
end
end

local number = game.ServerStorage.MoneyStorage:GetChildren()

number.Value.Changed:connect(function()
    number.Value = Convert(number.Value)
end)