They mentioned jewelry, some stores have little jewelry departments with wedding sets and such. If they broke into that, then they could get a haul pretty quickly. Otherwise, at $15 an item, it would take a semi load to get that kind of money.
The Penney store I worked over Christmas in Jewelry would lock all the diamond jewelry in safes overnight. Watches, silver and other jewelry was left in the cases. Many of the watches is around $300 plus retail. The gold and silver chains could easily cost $1000+ each.