The Producers is a musical adapted by Mel Brooks and Thomas Meehan from Brooks' 1968 film of the same name, with lyrics written by Brooks and music composed by Brooks and arranged by Glen Kelly and Doug Besterman.
8 ounces = 1 cup 4 ounces = 1/2 cup So yes, 12 ounces is equal to 1 1/2 cups.
It is 12.5 cups. A cup equals 250 mililiters. An ounce is 29.5735 mililiters, not a pretty equivalence. The reason is that they come from two different measuring systems. The ounce is derived from the gallon ( 1 ounce = 1/128 gallon ) and cups is based on the SI. But the conversion can be made nonetheless.