Clickdetector doesnt detect a click?

So, I'm trying to make a basic GUI script. When you click on the tool, a gui will pop up and if you click "yes" it will take away $5 of your money. If you click "no" the gui will close. The problem is: It's not that part of the script thats not working, its actually the clickdetector for the tool. The print statement after it doesn't run. Here is the script:

local player = game.Players.LocalPlayer
local mainGUI = player.PlayerGui.BuyScreen
local yes = mainGUI.Yes
local no = mainGUI.No
local info = mainGUI.Info
local dollars = player.leaderstats.dollars
local tool = script.Parent.Parent
local price = 5
script.Parent.ClickDetector.MouseClick:Connect(function()
    print("Click!")
    mainGUI.Enabled = true
    info.Text = "Are you sure you want to buy "..tool.Name.." for $"..price.."?"
    yes.MouseButton1Click:Connect(function()
        if dollars.Value >= price then
            dollars.Value = dollars.Value - price
            local clonetool = tool:Clone()
            clonetool.Parent = player.Backpack
            
            local clonetool = tool:Clone()
            clonetool.Parent = player.StarterGear
            
            mainGUI.Enabled = false
            
            no.MouseButton1Click:Connect(function()
                mainGUI.Enabled = false
            end)
        end
    end)
end)

Anyway, I would really appreciate it if you could help.

It appears you are attempting to use ClickDetectors for Gui Buttons. ClickDetectors are for detecting mouse clicks on 3d objects whilst a mouse button click detects clicks on 2d Ui objects.

Here's your script but modified:

local player = game.Players.LocalPlayer
local mainGUI = player.PlayerGui.BuyScreen
local yes = mainGUI.Yes
local no = mainGUI.No
local info = mainGUI.Info
local dollars = player.leaderstats.dollars
local tool = script.Parent.Parent
local price = 5
function onClick()
	print("Click!")
	mainGUI.Enabled = true
	info.Text = "Are you sure you want to buy "..tool.Name.." for $"..price.."?"
	yes.MouseButton1Click:Connect(function()
		 if dollars.Value >= price then
	         	dollars.Value = dollars.Value - price
	       		local clonetool = tool:Clone()
	         	clonetool.Parent = player.Backpack
	
	         	local clonetool = tool:Clone()
	         	clonetool.Parent = player.StarterGear
	
	         	mainGUI.Enabled = false
		end --Forgot to close off these function and if statements?
	end)
	no.MouseButton1Click:Connect(function()
		mainGUI.Enabled = false
        end)
  end
end)
script.Parent.MouseButton1Click:Connect(onClick) --MouseButton1Clicks detects left clicks on a 2d UI Object

I'm sorry if this was not what you were looking for.