*The other method is to continually calculate the average to account for purchases and sales throughout the year, with a final adjustment at year-end to account for inventory shrinkage (this method is also called "moving average"). With the advent of computerized inventory and accounting software this method is the most commonly used. | *The other method is to continually calculate the average to account for purchases and sales throughout the year, with a final adjustment at year-end to account for inventory shrinkage (this method is also called "moving average"). With the advent of computerized inventory and accounting software this method is the most commonly used. |