Use EXCEL ONLY - apply the Additive Seasonality approach for the following data set:

PLEASE SHOW YOUR WORK.

TABLE 2	COST OF LOCKERS[AS2]
Year	Per-Unit Labor Cost
1988	$80.15
1989	85.29
1990	85.75
1991	64.23
1992	63.70
1993	62.54
1994	60.19
1995	59.84
1996	57.29