What was SII's variable cost per dose and its rationale for the $13 price? What was the expected net present value (NPV) for Covishield? Calculate the NPV using the formula given below, as well as show the mathematical work for finding the variable cost.

(Hint: E[NPV] = Prob(Success)*NPV(Success)+Prob(Failure)*NPV(Failure)

C C 2 C. NPV=- + + 7 1+r (1+r) 2 T (1+r)