Question: 19 Sales of Cool-Man air conditioners have grown steadily during the past 5 years:

YEAR SALES

1 450

2 495

3 518

4 563

5 584

6 ?

The sales manager had predicted, before the business started, that year 1’s sales would be 410 air conditioners. Using exponential smoothing with a weight of \(\alpha \) = 0.30 develop forecasts for years 2 through 6.