If sales for 2008 (the base year), 2009, and 2010 are $20,000, $15,600, and $24,600, respectively, the index numbers assigned to 2009 and 2010, respectively, are
A) 62.4 and 128.
B) 156 and 118.
C) 128.2 and 133.
D) 78 and 123.

Question

Quizplus · Accepted Answer

Index numbers are calculated by dividing the sales of each year by the base year sales and then multiplying by 100. For 2009: (15,600 / 20,000) * 100 = 78. For 2010: (24,600 / 20,000) * 100 = 123.

If Sales for 2008 (The Base Year), 2009, and 2010