$($Accounting Change$$Inventory$)$ Linden Corporation started operations on January $1,2015,$ and has used the FIFO cost formula since its inception. In $2024,$ it decides to switch to the weighted average cost formula. You are provided with the following information.

Net Income

Retained Earnings $($Ending Balance$)$

Under FIFO

$$100,000160,000235,000340,000590,000780,000$

$2018$

$2019$

$2020$

$2021$

$2022$

$2023$

Instructions

Under FIFO

$$100,00070,00090,000120,000300,000305,000$

Under Weighted Average Cost

$ $92,00065,00085,000130,000293,000310,900$

Answer the following, ignoring income tax considerations.

a$.$ WhatisthebeginningretainedearningsbalanceatJanuary$1,2020,$ifLindenpreparescomparative financial statements starting in $2020?$

b$.$ WhatisthebeginningretainedearningsbalanceatJanuary$1,2023,$ifLindenpreparescomparative financial statements starting in $2023?$

c$.$ WhatisthebeginningretainedearningsbalanceatJanuary$1,2024,$ifLindenpreparessingle$-$period financial statements for $2024?$

d$.$ WhatisthenetincomereportedbyLindeninthe$2023$incomestatementifitpreparescomparative financial statements starting in $2021?$