等额本息还款模型
payment models of volume principal and interest
本月至今日成本金额
cost amount for month-to-date
贷款本金额
amount of principal of the loan
留本本金基金余额
endowment principal fund balance
等本息还款
the repayment of the same capital and interest
repayment of average capital plus interest
等额多次复合因子
uniform replenishing rate
等额多次现值因子
uniform series compound amount factor