Anita Limited has shared their annual sales revenue over the last 6 financial years from 2015 to 2020.

Month Sales ($ 000)

2015 8000

2016 8200

2017 8450

2018 9000

2019 9500

2020 9600

You are required to;

a.Using linear trend equation forecast the sales revenue of Anita Limited for 2021. (5 marks)

b)Calculate the forecasted sales difference if you use3-period weighted moving average designed with the following weights:2018 (0.1), 2019 (0.3) and 2020(0.6). (2 marks)