A firm's sales for a product line during the 12 quarters of the past three years were as follows:

The firm wants to forecast each quarter of the fourth year that is, quarters 13, 14, 15, and 16.

Transcribed Image Text:

QUARIER SALES QUARTER SALES 1 600 7 2,600 234 1550 8 2,900 1500 9 3,800 1,500 10 4.500 5 2,400 11 4,000 6 3,100 12 4,900