Prepare a forecast using:

a) Weighted Moving Ave. with the following weights: latest = 0.50, next = 0.3 and oldest = 0.20 on Co. D

b) Develop a regression equation relating to Co. C and predict Co. B

c) Determine monthly relatives using Co. D & C and predict the Co. A

d) Evaluate Error in Co. A to Co. C

Month Co. A Co. B Co. C Co. D

1 770 771 769 759

2 799 785 787 784

3 794 790 792 775

4 780 784 798 761

5 768 770 764 799

6 772 768 770 787

7 760 761 759 768

8 775 771 775 760

9 786 784 788 771

10 790 784 788 799