Business at Terry's Tie Shop can be viewed as falling into three distinct seasons: (1) Christmas (November-December); (2) Father's Day (late May - mid-June); and (3) all other times.
Average weekly sales (ins) during each of these three seasons during the past four years has been as follows:
Season Year 1 Year 2 Year 3 Year 4
1 1856 1995 2241 2280
2 2012 2168 2306 2408
3 985 1072 1105 1120
Determine a forecast for the average weekly sales in year 5 for each of the three seasons.