The income of 50 lunches a day depends on the price and cost of each lunch and the sales situation of the store.

The price of each box lunch is about 10 to 15 yuan, the cost is about 3 to 10 yuan, and the profit of each box lunch is about 60%. If the price of each box lunch is 10 yuan, the daily turnover of 50 boxes of lunch is 500 yuan, and the net profit is about 200 yuan.