How much does it cost to replace lost cuff links from a Men’s Wearhouse tuxedo rental?
I had a dance last night and rented a tuxedo for it from Men's Wearhouse. I wore cuff links with the tuxedo but I took them off and lost one of them. How much does it cost to replace either the one cuff link or the cuff link set?

A new set of studs and cufflinks costs $26.39:
http://www.menswearhouse.com/menswear/detail.jsp?FOLDER%3C%3Efolder_id=1408474395562243&FOLDER%3C%3EbrowsePath=1408474395562243
The kind they rent may be even cheaper. Annoying, but not a financial burden.
Why dont you call them and ask or read your contract?