DGET - Formula Returns #NUM! Error (I verified no duplicates)

To anyone that has encountered this issue, (see attached file)
I am trying to use the database DGET function and I continue to get the error result #NUM! which according to Excel help indicates duplicate values in the database. I reviewed the database by using auto filter on the criteria I entered for the DGET function and only 1 record is returned. So, how can there be a duplicate? I have also had bad results using the DSUM function especially when the criteria has similar items in the field but not a redundant item. Any help would be much appreciated.