Q. A manager of a store which sells and installs spas wants to prepare a forecast for January, February and March of next year. Her forecasts are a combination of trend and seasonality. She uses the subsequent equation to estimate the trend component of monthly demand: Ft = 59 + 7t, where t = 0 in June of last year. Seasonal relatives are 1.15 for January, 1.07 for February and 1.00 for March. Illustrate what demands should she predict?