Skysong Company began operations on January 1, 2015, and uses the average-cost method of pricing inventory. Management is contemplating a change in inventory methods for 2018. The following information is available for the years 20152017.

		Net Income Computed Using
		Average-Cost Method		FIFO Method		LIFO Method
2015		$16,150		$19,070		$11,880
2016		18,050		20,830		13,890
2017		20,200		25,150		16,840

(a) Prepare the journal entry necessary to record a change from the average cost method to the FIFO method in 2018. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.)

(b) Determine net income to be reported for 2015, 2016, and 2017, after giving effect to the change in accounting principle.

(c) Assume Skysong Company used the LIFO method instead of the average cost method during the years 20152017. In 2018, Skysong changed to the FIFO method. Prepare the journal entry necessary to record the change in principle. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts.)