How do I make my purchase script only work if they have 100 or more and subtract?

So I am making a game called Lemonade Break and I am working on making a script that will have you purchase items when you click on them, but it wont subtract the money, and I am trying to only make it work if they have 100 currency or more

local ToolNames = {"BetterTool"}
local Storage = game:GetService("ServerStorage")
local currencyy = game.Players.LocalPlayer.leaderstats.LemonsAte

local Part = script.Parent
local ClickDetector = Part:WaitForChild("ClickDetector")

ClickDetector.MouseClick:connect(function(Player)
    if Player and Player.Character and currencyy.Value > 99 then
        local Backpack = Player:WaitForChild("Backpack")
        for i = 1, #ToolNames do
            local Tool = Storage:FindFirstChild(ToolNames[i])
            if Tool then
                currencyy.Value =- 100
                    Tool:clone().Parent = Backpack
            end
        end
    end
end)