please help with all parts

During 2021, WMC Corporation discovered that its ending inventories reported on its financial statements were misstated by the following amounts: 2019 understated by 2020 overstated by $148,000 206,000 WMC uses the periodic Inventory system and the FIFO cost method, Required: 1-a. Determine the effect of 2019 errors on retained earnings at January 1, 2021, before any adjustments. (Ignore Income taxes.) 1-b. Determine the effect of 2020 errors on retained earnings at January 1, 2021, before any adjustments. (Ignore income taxes.) 2. Prepare a journal entry to correct the error in 2021. 3. Wil WMC account for the error (a) retrospectively or (b) prospectively? Complete this question by entering your answers in the tabs below. Reg 1A Reg 18 Reg 2 Reg 3 Determine the effect of 2019 errors on retained earnings at January 1, 2021, before any adjustments. (Ignore Income taxes.) (If the answers is no effect then select "No effect" in the dropdown.) 2019 2019 effect on 2021 Beginning inventory Beginning inventory Plus: net purchases Plus net purchases Less ending inventory Less ending inventory Cost of goods sold Cost of goods sold Revenues Less: cost of goods sold Less: other expenses Net Income Revenues Less: cost of goods sold Less other expenses Net Income Retained earings Retained earings Reg 18 Complete this question by entering your answers in the tabs below. Reg 1A Reg 1B Rea 2 Reg 3 Determine the effect of 2020 errors on retained earnings at January 1, 2021, before any adjustments. (Ignore income taxes.) (If the answers is no effect then select "No effect" in the dropdown.) 2020 Beginning inventory Plus: net purchases Less: ending inventory Cost of goods sold Revenues Less: cost of goods sold Less: other expenses Net Income Retained earnings Complete this question by entering your answers in the tabs below. Req 1A Reg 1B Reg 2 Reg 3 Prepare a journal entry to correct the error in 2021. (If no entry is required for a transaction/event, select "No journal entry required in the first account field.) View transaction list Journal entry worksheet 1 Record correction of error. Note: Enter debits before credits General Journal Debit Credit Event 1 Record entry Clear entry View general journal Complete this question by entering your answers in the tabs below. Reg 1A Req 18 Reg 2 Req3 Will WMC account for the error (a) retrospectively or (b) prospectively? WMC account for the error