Eduardo is filing his federal income tax return with the 1040ez form, and he received two w-2 forms, with the federal income tax withheld on one being $4160, and the federal income tax withheld on the other being $370. if eduardo 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 he enter on line 10

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?