You can use an array and a loop to make this less painless to edit and look at. As it is, it's only a matter of time before someone gets a headache 😆
Try this:
function onLogin(player)
local outfitsToUpgrade = {
136, 137, 138, 139, 140, 141, 142, 147, 148, 149, 150, 155, 156, 157...