# 定义个人所得税计算函数
def calculate_tax(income):
    # 起征点
    deduction = 5000
    
    # 计算应纳税所得额
    taxable_income = income - deduction
    
    # 如果应纳税所得额小于等于0，则无需缴税
    if taxable_income <= 0:
        return 0
    
    # 税率表
    tax_brackets = [
        (0, 3000, 0.03, 0),
        (3000, 12000, 0.10, 210),
        (12000, 25000, 0.20, 1410),
        (25000, 35000, 0.25, 2660),
        (35000, 55000, 0.30, 4410),
        (55000, 80000, 0.35, 7160),
        (80000, float('inf'), 0.45, 15160)
    ]
    
    # 计算应纳税额
    tax = 0
    for bracket in tax_brackets:
        if taxable_income > bracket[0]:
            tax += (min(taxable_income, bracket[1]) - bracket[0]) * bracket[2]
            taxable_income -= (min(taxable_income, bracket[1]) - bracket[0])
            tax += bracket[3]
        else:
            break
    
    return tax

# 计算5000元工资的应缴税额
tax_amount = calculate_tax(5000)
tax_amount