On May 10, 2023, Jason realized he had forgotten to claim $150 in interest income and $100 in ordinary dividends on his 2021 tax return, which had an AGI of $42,500. He was age 25 and single, claimed himself, and filed Form 1040. As an honest taxpayer, he wants to amend his return. If his return was otherwise correct, what amount should he enter on line 1, column C of Form 1040-X?