A Cupples & Leon ad in the September 15, 1920 issue of The Bookseller, Newsdealer and Stationer lists the book's retail price as 25 cents.
The on-sale date was most likely March 4, 1919. The Copyright Office filings for the first and second books in the series appear to have been transposed somehow. The March 4 date is reported for the second book, but the first book's publication date is reported as August 7, 1919. The second book also includes strips that were published in newspapers after March 4, which makes it all but impossible that it was published on that date.