R M G Inglis (R M G INGLIS)

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1 to 200 Per Cent and Per 100 Reckoner (Long Range)
Decimal Coinage Reckoner (Ideal)
Express Universal Decimal Percentage Reckoner
The 'Express' decimals of a penny reckoner: Every .01p to .99p, every 1p to £1, giving the calculations for 1/100ths of a penny, (The "Express" series v. 33)
The long range per tonne or per 1000 kilogrammes reckoner ...,
Multiplication of Metres Reckoner
On and Off Cost Percentage Reckoner
Per Tonne or 1000Kg Reckoner (Express)
Pocket Pricer for Fixing Selling Prices
Profit Reckoner