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Motion capture because of the way the shoulderblade slides underneath the skin. part of our research has been measuring how the shoulderblade moves. >> we use reflective markers. they cost 10 to $12 a marker. we're cheap. we cover our own. those cost about a quarter apiece. musculoskeletal simulation has been used for analysis of lower extremity injuries on a fairly wide scale basis. far less has been done with upper extremity. we're working on the development of an upper extremity model. >> the data we're getting here is really breaking down shoulder function in kids. >> he's got quite a bit ...

So dollar general has a bigger variety and they also have more name brands. >> steve: okay. one of the biggest name brands is cheerios. when it comes to going to get your best deal, do -- is the ber deal at the dollar store or a store like wal-mart or target? >> when you're shopping at the dollar stores, you want to kind of stick to the staple items. so basic food items like cereals, coffee, those types of items, you can't go wrong at the dollar store. >> steve: so it's a deal? >> it's a deal, yes. so specifically cheerios, the same box at dollar general is 2.85, while 3.50 at wal-mart. >> ste...