1. The sales of Proton Saga in Kuala Lumpur at AD Sdn Bhd during the past 5 years are as
follows:
YEAR SALES FORECAST
1 450 410
2 495
3 518
4 563
5 584
a) Using the trend projection method, develop a forecast for the sales of Proton Saga in
Kuala Lumpur through year 6.
b) What is the MAD?
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