I dispute with my friends

Worked out how much money I could get by on per day in Shanghai. I spend an average of 13yuan (£1) per day on a taxi journeys back and forward to work (based upon three people sharing). 8yuan (61p) for noodle soup plus 4yuan (31p) for a coke (lunch). Then need about 50yuan (£3-80) for a good evening meal with some beers. Add a couple of large bottles of beers at 3yuan (23p) each.. works out around 75yuan per day (£5-80).