Question: ***Please do not use excel*** The quarterly sales in units for Retailsale Sports for the last two years are as follows: Quarter Year 1 Year

***Please do not use excel***

The quarterly sales in units for Retailsale Sports for the last two years are as follows:

Quarter

Year 1

Year 2

I

440

560

II

460

490

III

420

500

IV

390

400

Using linear regression, a straight line was fitted to the sales data. Assume that the equation of the fitted line is Y = 420 + 6 t. The first quarter in the data is labeled t = 1.

  1. Calculate seasonal indexes for this product using the fitted line approach.
  2. Using the fitted line and seasonal indexes you have just calculated, forecast sales in
  3. each quarter of year 3.

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