This is all the info I was given, which is why I am confused about it. Any help would be greatly appreciated.

Carlinek is a Polish company, based in Poznan, which retails Aqua-Floor, a well-known water-resistant laminated floor covering. The company needs to forecast the demand of this product, by using historical data on the sales of the latest nine months, reported in Table 2.59. Table 2.59 Aqua-Floor product quantities (in m) sold by Carlinek in Poznan during the last nine months. Month Quantity Month Quantity 1 450 6 437 2 670 7 456 3 332 8 4 123 9 231 5 343 After checking the presence of possible outliers in the historical database, use the weighted moving average method to determine the one-month- ahead sales forecast