To do the math that is involved in the relationships between time, risk, opportunity cost, and value you need to know

A.

the costs per time period, or the magnitude of the effect of time on value.

B.

what the future cash flows (CF) will be, when the future cash flows will be, and the rate at which time affects value.

C.

the discount rate because time discounts value.

D.the timing and amounts of future cash flows