The following are monthly actual and forecast demand levels for May through December for units of a product manufactured by the D. Bishop Company in Des Moines:
|
MONTH
|
ACTUAL DEMAND
|
FORECAST DEMAND
|
|
May
|
100
|
100
|
|
June
|
80
|
104
|
|
July
|
110
|
99
|
|
August
|
115
|
101
|
|
September
|
105
|
104
|
|
October
|
110
|
104
|
|
November
|
125
|
105
|
|
December
|
120
|
109
|
What is the value of the tracking signal as of the end of December?