5325.96? Yuan. The calculation formula of financial interest rate is that interest equals (principal times expected rate of return) divided by 365 days multiplied by product days, so 150000 multiplied by 3.6% divided by 365 multiplied by 30 results in 443.83 yuan/month, and the total interest for one year is 5325.96? Yuan. Interest is the use fee of money in a certain period of time, which refers to the reward that the holder of money gets from the borrower for lending money or monetary capital.