After graduating from college, you and your friends started selling birdhouses made from recycled plastic. The idea has caught on, as shown by the following sales figures

Month	Demand
March	2200
April	2300
May	2500
June	3500
July	4000
August	5000

a. (3pts). Develop a forecast model for June through September by using an adjusted exponential smoothing model with =0.6 and =0.3. Assume that the unadjusted forecast (Ft) for May was 2,260 and the trend factor (Tt) for May was 18. (Using two decimals)

Month	Unadjusted exponential smoothing model	Trend factor (Tt)	Adjusted exponential smoothing model
March
April
May	2260	18
June		(0.3*
July
August
September

b (3 pts). Calculate the tracking signals for periods June through August.

	Actual demand	Adjusted exponential smoothing model	Forecast error	Absolute deviation		MAD	Tracking signal
June	3500
July	4000
August	5000