Tough Face, a manufacturer of rock-climbing gear, has been enjoying steady growth of its very reliable and colorful carabiner products. Using the following sales history, calculate the trend-adjusted exponential smoothing forecast for the next three years. The growth trend appears to be 150 cases, a = 0.75, and (3 = 0.85.
Year1..................................... 250
Year2..................................... 369
Year3..................................... 507
Year4..................................... 658
Year5..................................... 903