Professor Zhang's income in January is as follows: salary 3,000 yuan, bonus 500 yuan, and manuscript fee 600 yuan. According to the new tax law, after deducting 3,500 yuan and paying tax at 5%, how much should he earn in January?
张教授一月份收入如下：工资3000元，奖金500，稿费600元，按新税法规定，扣除3500元后，按5%缴税，他一月份应收入多少元？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">600 * (1/20)</gadget>
<output>30</output>

<gadget id="calculator">4_100 - 30</gadget>
<output>4_070</output>

<result>4_070</result>