An annuity is a series of equal payments occuring at equal time intervals, and this amount includes the sum of all payments plus interest, if allowed to accumulate at a definite rate of interest from the time of initial payment to the end of annuity term. Ordinary annuity is used in the calculation of the

A. Manufacturing cost

B. Depreciation by sinking fund method

C. Discrete compound interest

D. Cash ratio

Please do not use chat terms. Example: avoid using "grt" instead of "great".