. Continuation. In the context of the preceding exercise, suppose the revenue from each sale is r, and the cost associated with making n sales is n k=1 Yk, where Y k is the cost to make the kth sale....

. Continuation. In the context of the preceding exercise, suppose the revenue from each sale is r, and the cost associated with making n sales is n k=1 Yk, where Y_k
is the cost to make the kth sale. Assume Y₁, Y₂,... are i.i.d. with mean μ and variance σ², and the Y_k
are independent of Λ and the number of sales N. The net revenue from the N sales is