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Business P3

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and yea i got the answer.....
see to find x and y we have to substrate sales from Trend (centred moving
average) so the answer for x will be 33-32.5= 0.5m the same thing u have to do for y also....
and for z get the average of third quarter of Seasonal variation that is
7.5+7.875+8.25=23.625
now 23.625/3=7.875....
hope u understand...
 
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