A while back some of you were talking about selling gold and silver.I had some silver jewelry to send in,so weighed it three separate times (on a My Weigh MX-200 scale) to make sure of the total weight.All items were marked .925 or sterling and some were Mexican silver.The total I got was 357.8 dwt, now divided that by 20(20dwt pr T oz) and that gave me 17.89 T oz..Is this doing it correctly?Sent it in and today I received my check from Midwest Refineries and they say they received 10.886 T oz and that one of the pieces (marked.925) was not silver.What ya think of that? Did I miss something somewhere?