Page 280 - F2 - MA Integrated Workbook STUDENT 2018-19
P. 280
Chapter 12
(b) Using the multiplicative model forecast unit sales in each quarter of year
2
Year Quarter Trend Variation Forecast
20X2 1 100
20X2 2 110
20X2 3 120
20X2 4 130
Test your understanding 7
A company is preparing its budgets for next year.
The following regression equation has been found to be a reliable estimate of
the deseasonalised sales in units:
y = 500 + 15x
Where y is the total sales units and x refers to the accounting period.
Quarterly seasonal variations have been found to be:
Q1 Q2 Q3 Q4
+10% +25% –5% –30%
Calculate the seasonally adjusted sales units for accounting period 18 (which
is quarter 1)
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