UPDATE 3-OfficeMax profit crumbles; sees flat sales in Q2

* Shares down 13 percent (Adds link to graphic) By Dhanya Skariachan NEW YORK, April 28 (Reuters) - OfficeMax Inc (OMX.N The news came just days after larger rival Office Depot Inc (ODP.N Shares of OfficeMax, the third-largest U.S. office supplies...