Marin Company started operations on January 1, 2012, and has used the FIFO method of inventory valuation since its inception. In 2018, it decides to switch to the average-cost method. You are provided with the following information.

		Net Income				Retained Earnings (Ending Balance)
		Under FIFO		Under Average-Cost		Under FIFO
2012		$97,300		$86,600		$109,600
2013		66,500		61,300		167,800
2014		91,800		81,600		254,900
2015		119,600		130,300		331,700
2016		325,200		316,000		556,500
2017		295,200		300,100		824,100

(a) What is the beginning retained earnings balance at January 1, 2014, if Marin prepares comparative financial statements starting in 2014? (b) What is the beginning retained earnings balance at January 1, 2017, if Marin prepares comparative financial statements starting in 2017? (c) What is the beginning retained earnings balance at January 1, 2018, if Marin prepares single-period financial statements for 2018? (d) What is the net income reported by Marin in the 2017 income statement if it prepares comparative financial statements starting with 2015?