Problem #2: Handy, Inc., produces a solar-powered electronic calculator that has experienced the following monthly sales history for the first four months of the year, in thousands of units: January February 23.3 72.3 March April 30.3 15.5 If the forecast for January was 25, determine the one-step-ahead forecasts for February through May using exponential smoothing with a smoothing con- stant of a = .15