The document discusses stock turnover ratio, which measures how quickly a firm's stock is sold. It defines stock turnover ratio as the number of times per year that stock is turned into sales. A higher stock turnover ratio means stock is being sold more frequently and it takes less time, on average, to turn purchases of stock into sales. The document provides an example calculation of stock turnover ratio using cost of goods sold and average stock level data from two years. It finds the example company's stock turnover ratio is 2.0, meaning stock turns over twice per year on average, and it takes 183 days on average to sell stock purchases.