Base year is also the initial year in a series of annual amounts. For instance, an accountant might prepare a chart that displays the dollar amounts of a company's sales, gross profit, and net income for each of the years 2010 through 2012. In addition the accountant might add a price index for each line which expresses each line's amounts as a percentage of the 2010 amount. In this example the base year is 2010. Assuming that the sales for the years 2010 and 2011 and 2012 were $924,000 and $942,480 and $979,440, each of these would be divided by the $924,000 of sales in the base year 2010. The result would be the following index: 100 (for the base year 2010) and 102 (for 2011) and 106 (for 2012).
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