Big Box, Inc. is a calendar-year corporation. Its financial statements for the years ended 12/31/20 and 12/31/21 contained the following errors: Assume that no correcting entries were made at 12/31/20, or 12/31/21. Ignoring income taxes, by how much will retained earnings at 12/31/21 be understated or overstated? a. $80,000 overstatement b. $70,000 overstatement c. $100,000 understatement d. $30,000 understatement e. $100,000 overstatement