BT Tem 30a(31) :הכא במאי עסיקי׳, דטפי דמי כלב מחד מיניהו, וההוא טופיינא דכלב שדי בכולהו‏ : here what are we dealing with? Where the price of a dog is more than any one of (the lambs) and that excess amount is applied to all of them
See the entire entry for ṭup̄yān, ṭup̄yānā n.m. additional amount