How much should Pu Huarong borrow from 15000?

Hello, do you want to borrow 15000 yuan from Pu Ronghua? Pu Ronghua borrowed 15000 yuan and returned 20000 yuan. Puronghua is the latest vest product of Hengyi Loan. If you borrow 15000 from this platform, you have to pay back 20,000 yuan in 12 installments. The repayment in the first month is 3,000 yuan, and the repayment in the next month is about 1000 yuan. Users are not allowed to make overdue repayment, otherwise they will be included in the untrustworthy list. So a * * * wants to pay back 20 thousand.