Look at what you said. I'll do it for you. Add more.

250 yuan bought 1 1,000g, with a turnover of 250,000 yuan and a cost of 1, 250 yuan;

Closing price on Friday: 26 1 yuan/gram from 250+7+5-3-6+8, with a turnover of 26 1000 yuan and a cost of 783 yuan.

Income: 261000-250000-1250-783 = 8967 yuan.