Answer:
a. retained earnings statement, as a $630,000 addition to the beginning balance
Step-by-step explanation:
Data provided in the question
Change in increase in inventory = $900,000
Income tax rate = 30%
By considering the above information, the cumulative effect is
= Change in increase in inventory - Change in increase in inventory × income tax rate
= $900,000 - $900,000 × 30%
= $900,000 - $270,000
= $630,000
This $630,000 is a addition to the beginning balance