During the year ended 31 December 2015, the directors of Naples Ltd decided to change the company's accounting policy in respect of consumable stores, such as dyes and threads used in the manufacturing process. In the year ended 31 December 2014, and all years prior to that, Naples' stated accounting policy was to write off the costs of such consumable stores as incurred. The directors now wish to recognise consumable stores as inventory, on the grounds that this better matches purchases made to sales generated. As a result, Hazra, the accountant, included closing inventory of consumable stores of $22,600 in the draft financial statements for the year ended 31 December 2015, but made no other adjustments. Roberto, the financial controller, has established that the equivalent figure at 31 December 2014 was $31,200, but it has not been possible to arrive at figures prior to that date. Required: Explain the FRS 8 accounting treatment for the above transaction