In Taizhou, Jiangsu, when the social security base is 21,200 yuan, the specific payment amounts for each type of insurance are as follows:

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

2. Medical Insurance (including Maternity Insurance): The unit payment ratio is ​
   8.5%+0.5%=9%
   , so the unit pays ​
   ×9%=
   yuan; the individual payment ratio is ​
   2%+0.3%=2.3%
   , and the individual pays ​
   ×2.3%=487.6
   yuan.

3. Unemployment Insurance: The unit payment ratio is 0.5%, so the unit pays ​
   ×0.5%=
   yuan; the individual payment ratio is also 0.5%, and the individual pays ​
   ×0.5%=
   yuan.

4. Work Injury Insurance: The unit payment ratio is determined according to industry standards, ranging from 0.6% - 2.4%. Taking the median value of 1.5% as an example, the unit pays ​
   ×1.5%=
   yuan, and individuals do not pay.

In summary, when the social security base in Taizhou is 21,200 yuan, the total amount paid by the unit per month is approximately ​