14 (a) Sofia earns $7.60 for each hour she works. She starts work at 7.45 a.m. and finishes at 4/30 p.m. She stops work for half an hour for lunch. How much does she earn for the day? (b) Marlon earns $1500 each month. He pays rent of $525 each month. Find the amount he pays in rent as a percentage of his earnings.