Kingbird 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. 2015 2016 2017 2018 2019 2020 Net Income Under FIFO Under Average-Cost $97,300 $86,600 66,500 61,300 91,800 81,600 119,600 130,300 325,200 316,000 295,200 300,100 Retained Earnings (Ending Balance) Under FIFO $109,600 167,800 254,900 331,700 556,500 824,100 (a) What is the beginning retained earnings balance at January 1, 2017, if Kingbird prepares comparative financial statements starting in 2017? Retained earnings, January 1 $ 151.900 (b) What is the beginning retained earnings balance at January 1, 2020, if Kingbird prepares comparative financial statements starting in 2020? Retained earnings, January 1 $ (c) What is the beginning retained earnings balance at January 1, 2021, if Kingbird prepares single-period financial statements for 2021? Retained earnings, January 1 $ (d) What is the net income reported by Kingbird in the 2020 income statement if it prepares comparative financial statements starting with 2018 2018 2019 2020 Net Income $ $