Delicatessen is a popular gourmet brand. Nowadays, the daily income of a delicatessen restaurant on the market is about 3,000 yuan, the profit ratio is about 50%, and the daily net profit is about 800 yuan. Excluding labor and miscellaneous expenses, The total profit from opening a delicatessen in a month is 18,000 yuan.

The profits of meat are relatively high: for example, chicken legs cost 9 yuan per catty, and after processing, they can be sold for 17 yuan per catty; and duck neck costs 12 yuan per catty, and after processing, 20 yuan per catty. Yuan per catty; the cost of duck wings is 14 yuan per catty, and after processing, it is 25 yuan per catty.