use an Excel spreadsheet to analyze forecasting performance. Your company produces and distributes two Consumer External Hard Drives lines: 1 Terabyte drives (1 Tb) and 5 Terabyte Drives (5 Tb). The p

use an Excel spreadsheet to analyze forecasting performance. Your company produces and distributes two Consumer External Hard Drives lines: 1 Terabyte drives (1 Tb) and 5 Terabyte Drives (5 Tb). The previous two years’ unit sales levels and forecasts are in the table below. For this exercise, You have been asked to calculate the Forecast error, Forecast Percentage, Mean percentage Error (MPE), and Mean Absolute Percentage Error (MAPE) for (a) each type of terabyte, (b) each year, and (c) for every two years. The concepts, equations, and examples for calculating this forecasting effectiveness are covered in your textbook on pages 107 – 114. Finally, for each set of problems, you will provide insight into the sales trends and forecasting effectiveness with a written summary of your findings. Please note that this is me