how to use cpio to unzip file

Dear experts here;

I got a request from my coworker to retrieve one lost file from a backup archive.  when i check the archive, it's a big file with 67 GB, and the file ended with .cpio. How could I unzip this file and retrieve a file called Freight Survey Totals.xls (the original path of the file is  /u1/shares/ncshare/Freight Survey Totals.xls) Thank you a lot.

I am waiting for solution online, please help.


[root@triton DACS]# ls -l
total 65681548
-rw-rw-r-- 1 dacs dacs 67257892864 Dec 18 00:06 ncdacs2_20121217223057.cpio
drwxr-xr-x 2 root root        4096 Jan  4 13:23 tmp