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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Net sales can be found by adding your entire income from sales, then deducting any losses or returns that you've had. Also remember to deduct any discounts from the gross sales amount
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((current month's sales  last month's sales)/last month's sales)x100
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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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