Ralph sold brownies for $0.27 a piece in order to earn money to buy baseball cards. if the cards cost $0.54 per pack, and if ralph had no money left over after buying them, what is the least number of brownies he must have sold?

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?