Beta Inc. is a calendar-year corporation. Its financial statements for the years ended 12/31/20 and 12/31/21 contained the following errors:

2020 2021

Ending inventory $40,000 overstatement $60,000 overstatement

Depreciation expense 15,000 overstatement 30,000 overstatement

Assume that the 2020 errors were not corrected and that no errors occurred in 2019. By what amount will 2020 income before income taxes be overstated or understated?