The All American Toy Company has records for quarterly sales for the past 4 points 4 years. These data are shown as follows. Given these data, develop a forecast for quarter 17 using a double exponential smoothing model with alpha = 0.20, beta = 0.30 and starting values for C and T based on the linear trend regression model for periods 1-16.
 

Quarter Sales 1 3000 5000 5500 4 7000 3400 6000 6200 8. 8100 9. 3600 10 6700 11 6400 12 9000 13 4000 14 7000 15 7300 16 9900 567