Silly Chicken Tender Question

I often buy the Tyson frozen boneless skinless chicken tenders and I can't seem to find a consensus on how many calories are in each tender.  The bag lists 100 calories for 4oz.  I don't have a food scale.  Any help??

Thanks you!

The CC tool says 5 tenders. 

http://caloriecount.about.com/cc/item/110624. html

I think that is for the breaded, pre-cooked kind... Thank you though!

Usually, the Tyson stuff is portioned out. So each tender would be about 4 oz. and therefore a serving.  It's just an approximate.  If they are the skinless, boneless, non-cooked, they are about 30 calories an ounce or 120 for the 4 ounce serving. 

I am assuming it says how many servings per bag, why not count how many are in the bag, then divide by the amount of servings?