Problem 18-28 (Algo) The following are historical demand data: YEAR SEASON 2011 Spring Summer Fall Winter Spring Summer 2012 Fall Winter ACTUAL DEMAND 205 151 379 560 481 268 679 959 Use regression analysis on deseasonalized demand to forecast demand in summer 2013. (Do not round intermediate calculations. Round your answer to the nearest whole number.) Forecast for summer 2013 344

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