Wonderful Windows Inc. (Wonderful Windows) manufactures wood frame windows and frames and is preparing financial statements for the current year end. Assuming Wonderful Windows reports under IFRS, which of the following circumstances requires prospective treatment?

Question 15 options:

a)	Wonderful Windows amortizes its delivery trucks over eight years, but it has been discovered that all trucks purchased last year have been amortized over five years.

b)	Wonderful Windows purchased some new cutting equipment last year and determined it should be amortized over six years. However, technology changes in the current year have resulted in management assessing that this equipment will now need to be replaced in two years.

c)	During the year, Wonderful Windows expensed an allocation of direct labour costs which should have been added to ending inventory. This resulted in an overstatement of COGS last year.

d)	Wonderful Windows has decided to change its inventory costing method from WA to FIFO, to be more comparable to its closest competitors.