1. Subtract the earliest date's sales in dollars from the most current sales figures to find the dollar amount of growth. For instance, company A sold $100 worth of goods in 1995
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((current month's sales  last month's sales)/last month's sales)x100
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1 Gather the numbers you will need to calculate the compound annual growth rate. Make sure you know what your initial investment was, what the value of your investment is today and
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1. Add together the net proceeds and dividends from your investment. This can be calculated over any period of time, so for example, if you want to calculate simple returns for the
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