The data on monthly sales (in thousands of Rs) of a company are given as follows:

Assuming there is no trend, compute the monthly seasonal indices. Using these indices, prepare the monthly sales schedule for the year 2009 if the total sales for the year are projected to be Rs 5,60,000.

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2006 46 45 44 46 2007 45 44 43 46 2008 42 41 40 44 444 45 47 46 43 40 40 41 45 46 45 47 42 43 42 43 44 45 45 46 43 41 40 42 45