Script Error: Attempt to perform (sub) on string and number?

script.Parent.Text = "FINGER SURGERY WILL COST THIS MUCH: " - 250 * wait(2) rawget(game.Players.LocalPlayer:WaitForChild("PlayerGui").Values.NC.NCValue.Value)

The code above is supposed to make a cost of getting something multiplied by how many of the things you have. I dont know how to get it to not say the other error i used to get,

The errors before i did rawget: Attempt to index nil with WaitForChild and: Attempt to index nil with PlayerGui

The errors werent togetther but just failed attempts of the script. Yes, it is a script inside a TextButton inside a Frame inside a ScreenGui

I though using wait would wait for the screen gui to actually get into the player, because there is no playergui already inside the player before playing.

Here, in your script, it looks like you are trying to subtract a string. script.Parent.Text = "FINGER SURGERY WILL COST THIS MUCH: " - 250 If you want to get a number, you can do this:

local cost = 250
script.Parent.Text = "FINGER SURGERY WILL COST THIS MUCH: "..cost