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.
There are 8 ounces in 1 cup and the ounces get doubles in case of 2 cups. So there are 16 ounces in 2 cups which is same as 1 pint. So in the same way then if you double the quantity of ounces then the quantity of cups automatically gets doubled.