For this kind of money because bsra configured as an Annuity. Which is the case if you want the system to be evaluated correctly. Bpa make the kind of money to pay back.
In this case, it is because that kind of money, BSRA is configured as regular income, like that for the case if you want the system to calculate correctly. Please give cash money/BPA.
In this case it is because of money BSRA has been configured as a fixed amount like that for the case, if you want to calculate the correct amount of BPA, please, in the supply of money.