The below table presents the sales data as well as three sets of forecasts that the company is investigating as contenders to forecast their sales going forward: a Nave forecast, a two-period moving average, and exponential smoothing with a = 0.1 for periods 2 to 11. Nave 2-Period-MA Exponential Smoothing Actual Sales Period (Units) Forecast Forecast Forecast January 1220 1220 February 1225 1220 1220,00 March 1227 1225 1222,50 1220,50 April 1239 1227 1226,00 1221,15 May 1249 1239 1233,00 1222,94 June 1239 1249 1244,00 1225,54 July 1228 1239 1244,00 1226,89 August 1248 1228 1233,50 1227,00 September 1234 1248 1238,00 1229,10 October 1219 1234 1241,00 1229,59 November 1222 1219 1226,50 1228,53