In the last century, throughout most Middle Eastern countries, it was common to give the distances between cities in walking distances. For example, Khaybar is ten days' journey by foot to Jeddah. See also. Pacing (surveying) Pace (unit) League (unit) Parasang; Biblical mile; References
A mass-market paperback is a small, usually non-illustrated, inexpensive bookbinding format. This includes the UK A-format books of 110 mm Ã 178 mm (4.3 in Ã 7.0 in) and the US pocketbook format books of a similar size.
For a mass market paperback, most of the royalties will be in the 10% level, and the price will be maybe $7.99 per copy, or $0.79 per sale in royalties. That makes it $79,000 per 100,000 copies sold. Combine the two, and you're looking at an average of about $140,000 per 100,000.