Using the following information regarding actual sales for Sam’s Ski Supplies, calculate the seasonal forecast ...

     Using the following information regarding actual sales for Sam’s   Ski Supplies, calculate the seasonal forecast of sales for November of Year 3   Month First Year Second Year    January 380 400     February 340 360     March 320 330     April 280 290     May 265 270     June 230 235     July 220 230     August 200 205     September 210 220     October 250 270     November 400 450     December 450 502