Wal Mart here has been selling 100-round packs for $14.88 lately (was $15.88). Both Federal and Winchester 12 gauge with 1-1/8 oz loads at 3 dr. eq. (sometimes #7-1/2 and sometimes #8 shot).
Locally Wally has both the 100 round pack for about the same, but sells the 25 rd box of Win for 2.98.
So if you buy 4 boxes of 25 rd you pay 11.92, or 15.88 for a box of 100. Save $3.96.
Don't know why Wallyworld prices it like that, but it has always annoyed me.