40000 *10%-40000 *10% * 0.5%-40000 *10% * 3% = 3860 (yuan)

Note: 40000 * 10% is pre-tax profit, 40000 * 10% * 0.5% is stamp duty (also a tax), and 40000 * 10% * 3% is personal income tax. The reason for deducting those taxes is that the taxes are. Hope to adopt