Maddox, a division of Stanley Enterprises, currently performs computer services for various departments of the firm. One of the services has created a number of operating problems, and management is exploring whether to outsource the service to a consultant. Traceable variable and fixed operating costs total $80,000 and $25,000, respectively, in addition to $18,000 of corporate administrative overhead allocated from Stanley. If Maddox were to use the outside consultant, fixed operating costs would be reduced by 70%. The irrelevant costs in Maddox's outsourcing decision total:

A. $17,500. B. $18,000. C. $25,000. D. $25,500. E. $105,500.