1, the so-called annual sinking fund is the known final value of the annuity (f), and the annuity (a) is found; Is the inverse operation for calculating the final value of ordinary annuity. 10 years later will still be 10 million, so it is unnecessary to save 10 million every year. Therefore, the annual sinking fund.

2, the so-called annual capital recovery, is the present value of the known annuity (P), and annuity (A); Is the inverse operation to calculate the present value of ordinary annuity. Now the investment is 6,543,800 yuan, and it will be recovered every year in 654.38+ 00 years, which is not enough. Annual capital recovery.