Today's OED antedating: "to add (it all) up"

To add (it all) up, colloquial, to make sense (of it) ("add," v., sec 5 (b), first use cited 1942): Book titled Ade's Fables, by George Ade, 1914, p 91: "[T]he poor gink who calls loudly for English Mustard ... may have his brief Hour of Triumph, but no man ever really got anywhere by doping Salad, when you stop to add it all up."