You work in a shoe store as an accountant. Some of the boxes of shoes have been sitting in the stock room for literally years. Your boss wants to switch from a periodic inventory system where he estimates ending inventory by making an educated guess to something that provides better information on a regular basis. He also want to maximize gross profit. The cost of shoes from the supplier has been steadily rising for years and that trend is expected to continue. Other than by style, the shoes are not individually tracked. What is your recommendation?