Problem 3-11 (Algo) A manager of a store that 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 following equation to estimate the trend component of monthly demand: F+= 70 + 3t, where t = 0 in June of last year. Seasonal relatives are .86 for January, 1.02 for February, and .99 for March. What demands should she predict? (Round your answers to 2 decimal places.) Month January of the next year February of the next year March of the next year Forecast