The 'international' pricing tables and percentage reckoner : showing at a glance the single addition to a cost price which provides for discount, working expenses, and net profit, or working expenses, and net profit, or discount, and gross profit, or profit on gross returns ; with highly-detailed percentage tables, rising to 99 1/2% by 1/2% in both British and decimal currency /
Sims, Gordon.
Inglis, J. Gall(James Gall),1864-1939.
London ; Edinburgh : Gall and Inglis,
[1906]
Ready-reckoners.