Concept:Stock turnover period is the number of days, on average, that goods remain in stock before being sold.Explanation:First, find the cost of goods sold using the formula:Cost of goods sold=Opening stock+Purchases−Closing stock=60,000+230,000−40,000=250,000Next, calculate the average stock:Average stock=260,000+40,000=50,000Now, compute the stock turnover rate:Stock turnover=50,000250,000=5 timesFinally, convert this into the stock turnover period for the year:Stock turnover period=5365=73 daysAnswer:73 days