If the social security base in Huai'an, Jiangsu is 18,200 yuan, the specific social security payment amounts for different insurance types are as follows:

1. Endowment Insurance: The unit payment ratio is 16%, so the unit monthly payment is ​
   ×16%=
   yuan; the individual payment ratio is 8%, and the individual monthly payment is ​
   ×8%=
   yuan.

2. Medical Insurance: The unit payment ratio is 8%, and the unit monthly payment is ​
   ×8%=
   yuan; the individual payment ratio is 2%, and the individual monthly payment is ​
   ×2%=
   yuan.

3. Unemployment Insurance: The unit payment ratio is 0.7%, and the unit monthly payment is ​
   ×0.7%=127.4
   yuan; the individual payment ratio is 0.3%, and the individual monthly payment is ​
   ×0.3%=54.6
   yuan.

4. Work - related Injury Insurance: The unit payment ratio ranges from 0.5% to 1.6% depending on the industry. Taking the lowest 0.5% as an example, the unit monthly payment is ​
   ×0.5%=
   yuan (the actual amount varies by industry, and individuals do not pay for work - related injury insurance).

5. Maternity Insurance: The unit payment ratio is 0.9%, and the unit monthly payment is ​
   ×0.9%=163.8
   yuan (individuals do not pay for maternity insurance).

In summary, when the social security base in Huai'an is 18,200 yuan, the total monthly social security payment for the unit is approximately ​