15. The Global Machine Manufacturing Company, manufacturing Heavy Machines in the Sultanate of Oman. The company has decided to buy a new advance machine to produce the different equipments. The decision will rest partly on the anticipate sales of machines in the coming months. The actual numbers of machines sold during the past years are as follows:

Year	Number of machines (Actual)
2014	900
2015	1200
2016	1400
2017	1550
2018	1725
2019	1860
2020	2025

Compute the forecast for the year 2021 using exponential smoothing with a forecast for the year 2014 of 800 and = .4