The Acme Toy Company Introduced a New Electric Train,the Silver

The Acme Toy Company introduced a new electric train,the Silver Bullet,in its Christmas catalog last year.Within four days of the catalog's mailing date,Acme had received phone orders for its entire inventory of trains.Paul Murrah,the sales manager responsible for the Silver Bullet,was delighted with the product's success.However,his excitement was overshadowed by the ____ cost resulting from lost sales that his division would suffer.

A) variable
B) stock-out
C) opportunity
D) fixed
E) holding