Mai earns $7 per hour mowing her neighbor's lawns. She also earned $14 far hauling away bags of recyclables for some neighbor's. Priya babysits her neighbor's children. Shw earns $8.40 per hour. Priya and Nai have agreed to go to the movies the weekends after they have earned the same amount of money for the same number of work hours How much money do they each have to work before they go to the movies?