Helen, angela, and tanya are picking apples for an orchard. the girls will get paid $4.00 per bushel that they pick. helen can pick 3 bushels per hour, angela can pick 4 bushels per hour, and tanya only picks 2 1/2 bushels per hour. if they all work for 3 hours and then helen and tanya take a 30 min break, but angela keeps working. then they all continue working for 3 more hours, how many bushels of apples do they pick that day and what are their average earnings per hour?