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Question 4 of 11 View Policies Current Attempt in Progress Sage Company started operations on January 1, 2015, and has used the FIFO method of inventory valuation since its inception. In 2021 , it decides to switch to the average-cost method. You are provided with the following information. (a) What is the beginning retained earnings balance at January 1,2017, if Sage prepares comparative financial statements 5 tarting in 2017 ? Retained earnings, January 1 (b) What is the beginning retained earnings balance at January 1,2020 , if Sage prepaces comparative financial statements starting in 2020 ? Retained earnings, January 1 is (c) What is the beginningretained earnings balance at Januscy 1.2021 . ir sige prepaces singlit-period financial statements for 2021 ? (d) What is the net income reported by Sage in the 2020 income statement if it prepares comparative financial statements starting with 2018