Earnings per share = price per share-average cost per share

Average cost per share = total purchases/total positions.

Total purchase amount = total installment purchase amount, total position = total installment purchase amount.

For example, 10.00 yuan to buy 1000 shares; 5.00 yuan to buy 2000 shares, the current market price is 5.00 yuan.

Average cost per share = (10000.00+10000.00)/(1000+2000) ≈ 6.67 yuan.

Earnings per share =5.00-6.67=- 1.67 yuan (earnings per share:-1.67 yuan, that is, loss per share: 1.67 yuan).

Total income = 3000 * (1.67) = -50 10.00 yuan (total income:-50 10.00 yuan, that is, total loss is 5010.00 yuan).