Where can I add these?
        ply.notificationType = {"You sold some dank weed", ""}
        ply:addEXP(earning*2)

// Here we serv the Pizza
function ENT:ServPizza(pizza,ply)
	local pizzaID = pizza:GetPizzaID()
	local pizzaData = zpizmak.config.Pizzas[pizzaID]

	local ValidCustomer
	local ValidCustomerTime = 999999
	for k, v in pairs(self.Customers) do
		if (v.agentPlate:GetPizzaID() == pizzaID and v.agentPlate:GetPizzaWaitTime() < ValidCustomerTime) then
			ValidCustomer = v
			ValidCustomerTime = v.agentPlate:GetPizzaWaitTime()
		end
	end

	if ValidCustomer then

		pizza.Delivered = true

		local pizzaPrice = zpizmak.f.GetPizzaFullIngredientPrice(pizzaID)
		local earnings = pizzaPrice + pizzaData.Price

		if (pizza:GetCurrentState_Index() == 3) then
			zpizmak.f.Notify(ply, zpizmak.language.Customer_ServPizza_good, 0)
		elseif (pizza:GetCurrentState_Index() == 4) then
			earnings = earnings * zpizmak.config.Customer_BurnedPizzaPenalty
			zpizmak.f.Notify(ply, zpizmak.language.Customer_ServPizza_bad, 1)
		end

		timer.Remove("CustomerTable_" .. self:EntIndex() .. "_Customer_" .. ValidCustomer.agent:EntIndex())
		pizza:Remove()

		local customerData = zpizmak.config.Customers[ValidCustomer.customerID]
		local ServAnim = customerData.ServAnim[math.random(#customerData.ServAnim)]
		zpizmak.f.CreateAnimTable(ValidCustomer.agent, ServAnim, 1)
		local dur = ValidCustomer.agent:SequenceDuration(ValidCustomer.agent:LookupSequence(ServAnim))

		timer.Simple(dur, function()
			if (IsValid(self) and IsValid(ValidCustomer.agent)) then
				zpizmak.f.Notify(ply, zpizmak.language.Customer_Pays .. "  +" .. zpizmak.config.Currency .. tostring(earnings), 0)
				self:DeSpawnCustomer(ValidCustomer, earnings)
			end
		end)
	end
end