Sales of vegetable dehydrators at Bud Banis€™s discount department store in Gander over the past year are shown below. Management prepared a forecast using a combination of exponential smoothing and its collective judgment for the four months March, April, May, and June of 2016:

a) Compute MAD and MAPE for management€™s technique.
b) Do management€™s results outperform (i.e., have smaller MAD and MAPE than) a naive forecast?
c) Which forecast do you recommend, based on lower forecast error?

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2015-2016 Management's Forecast Month Unit Sales July August September 100 93 96 October 110 November 124 December 119 January February 92 83 101 March 120 April May 96 114 89 110 June 108 108