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Find the monthly forecast and seasonal indices for year 2021, given the following data:

Find the monthly forecast and seasonal indices for year 2021, given the following data:

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Q3) You work for BMW as a planner. BMW sold 1,081,000 of its BMW-X5 cars in 2019 and sold 1,189,100 of its BMW-X5 cars in 2020. BMW is expecting to increase its annual sales for BMW- X5 in year 2021 by 10% compared to year 2020 (total sales volume = 1,308,010). Find the monthly forecast and seasonal indices for year 2021, given the following data:

(Please considers the monthly seasonal effect)

MONTH

Actual Car Sales (2019)

Actual Car Sales (2020)

Forecasted Car Sales (2021)

Jan

80,000

88,000

 

Feb

85,000

93,500

 

Mar

86,000

94,600

 

Apr

90,000

99,000

 

May

92,000

101,200

 

June

100,000

110,000

 

July

120,000

132,000

 

Aug

90,000

99,000

 

Sept

86,000

94,600

 

Oct

85,000

93,500

 

Nov

84,000

92,400

 

Dec

83,000

91,300

 

 

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