Xiao Ming's father works in a joint venture with a monthly salary of 3,700 yuan, of which 2,000 yuan is tax-free according to regulations, and the rest is subject to personal income tax. The payable salary is divided into two parts and paid according to different monthly taxes, that is, the part not exceeding 500 yuan is subject to a 5% tax rate, and the part exceeding 500 yuan and not exceeding 2000 yuan is subject to a 10% tax rate. How much personal income tax should Xiaoming's father pay every month?
小明的爸爸在一家合资企业工作，月工资为3700元，按规定其中2000元是免税的，其余部分要缴纳个人所得税．应缴纳工资分成两部分按不同月税纳税，即不超过500元部分按5%的税率，超过500元不超过2000元部分则按10%的税率．小明爸爸每月应缴纳个人所得税多少元？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">500 * (1/20)</gadget>
<output>25</output>

<gadget id="calculator">3_700 - 2_000</gadget>
<output>1_700</output>

<gadget id="calculator">1_700 - 500</gadget>
<output>1_200</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_200 * (1/10)</gadget>
<output>120</output>

<gadget id="calculator">25 + 120</gadget>
<output>145</output>

<result>145</result>