Gravel, Inc., earns book net income before tax of $600,000. Gravel puts into service a depreciable asset this year, and its first-year tax depreciation exceeds book depreciation by $120,000. Gravel has recorded no other temporary or permanent book-tax differences. Assuming that the U.S. tax rate is 21%, what is Gravel's current income tax expense reported on its GAAP financial statements?