I understand that using the C x [1/r-1/r(1+r)^t] gives the PV value of an annuity one period from now.

So if I was asked to decide between paying $10,000 now, or an annuity with a calculated PV of $10,001, would I choose the $10,000 now? Or, do I need to calculate the PV of $10,000 one period from now, such that after one period of interest the PV of $10,000 now becomes greater than $10,001?