What is the payment base of 3800 people?

The payment base is 3,800 people who pay 399 yuan for social security. On-the-job pension insurance payment ratio is 8%, and the monthly payment is 3800*8%=304 yuan; The proportion of on-the-job medical insurance payment is 2%, and the monthly payment is 3800*2%=76 yuan; On-the-job employees' unemployment insurance contribution rate is 0.5%, and the monthly payment is 3800*0.5%= 19 yuan, totaling 399 yuan. However, different regions pay different proportions, and the specific amount should be determined according to specific regions.