Sales of Volkswagens have grown steadily at auto dealerships in Nevada during sle past 5 years (see table below). Using exponentiar smoothing with a smocthing constant (a) of 0.30 and a starting forecast of 420.00 , the following sales forecast has been developed The MAD for a fortecast developed using exponential smoothing with a =030 is sales (round yeur cosponse to two decimel placess)