Table 1 shows the weekly sales for the number of gallons of deck sealer at the local hardware store during the spring months and the smoothing values for a 4- point moving average and simple exponential method with a of 0.2. Table 1: Sales for the number of gallons of deck sealer SES Week Gallon Cans Sold Moving average (4) (a = 0.2) 1 106 2 110 3 108 4 97 5 210 6 136 7 128 00 8 134