2.2 As a waitress Sarah earns R100 per night and commission of 7,5% on her takings. Phewa earns R120 per night and a commission of 5%. How much business must each of the waitresses bring in per night, in order for each to earn R400? (3) 2.3 Sarah's friend Rose in London is also a waitress, but she earns only a basic salary of 3,50 per hour. On a particular day the exchange rate was R11,50 = 1,00. How much (to the nearest rand) did Rose earn if she worked for six hours on that day? (2)