Gwendolyn is filing her federal income tax return with the 1040EZ form, and she received two W-2 forms. On one, $2910 in federal income tax was withheld, and $940 was withheld on the other. If Gwendolyn received a Making Work Pay credit of $400, and if lines 9a and 9b in the Payments, Credits, and Tax section below are $0, what should she enter on line 10?