在准备CFA-I考试中对于存货周转天数的计算方法存在疑惑：在第四册Corporate Finance and Portfolio Management 教材第149页中提到：The number of days of inventory, also known as the average inventroy period, day's sales in ending inventory, and the inventory holding period ,is the length of time.似乎是使用了期末存货来计算，在课后的习题1、2中也是用期末存货来计算存货周转天数的。
