When Violet has a numbers problem and Arthur is penniless, they go into business and solve both problems.
- ISBN10 0064440486
- ISBN13 9780064440486
- Publish Date 11 April 1984 (first published 28 October 1981)
- Publish Status Active
- Publish Country US
- Publisher HarperCollins Publishers
- Imprint Collins
- Format Paperback (US Trade)
- Pages 64
- Language English