private static void printSpecs(ArrayList<Computer> computerList) {
   // print specs for reference
   DecimalFormat price = new DecimalFormat("$0.00");
   DecimalFormat speed = new DecimalFormat("0.0 GHz");
   DecimalFormat memory = new DecimalFormat("0.0 GB");
   for (Computer c : computerList) {
     System.out.println(
         "Model: "
             + c.getModel()
             + " | Memory: "
             + memory.format(c.getMemory())
             + " | Speed: "
             + speed.format(c.getSpeed())
             + " | GraphicsCard: "
             + c.getCard()
             + " | Price: "
             + price.format(c.getPrice()));
     System.out.println();
   }
 }