Table P-20 contains quarterly sales ($MM) of The Gap for fiscal years 1980-2004. Plot The Gap sales

Question:

Table P-20 contains quarterly sales ($MM) of The Gap for fiscal years 1980-2004. Plot The Gap sales data as a time series and examine its properties. The objective is to generate forecasts of sales for the four quarters of 2005. Select an appropriate smoothing method for forecasting and justify your choice.