Additional Algo 15-12 Forecasting with Seasonality Demand history for the past three years is shown below, along with the seasonal indices for each quarter. Seasonal Year Quarter Demand Index Year 1 Q1 344 0.767 Q2 393 0.852 Q3 579 1.313 Q4 509 1.095 Year 2 Q1 360 0.767 Q2 364 0.852 Q3 613 1.313 Q4 532 1.095 Year 3 Q1 361 0.767 Q2 388 0.852 Q3 632 1.313 Q4 480 1.095 Use exponential smoothing with alpha (a) = 0.25 and an initial forecast of 463 along with seasonality to calculate the Year 4, Q1 forecast. Note: Do not round intermediate calculations. Round your answer to the nearest whole number. Year 4, Q1 forecast