What is the value at the end of an investment if the interest rate is 4% and the payment period is two years, with a periodic payment of 750 currency units. The investment has a present value of 2,500 currency units.
一笔贷款的利率是 4%，要在两年内以 750 货币单位的分期支付额分期偿清，其未来值是多小呢？该笔贷款的现金值是 2500 货币单位。