From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph showing the effect of mass production volume on various cost components and the trade selling price per car.
| Identifier | ExFiles\Box 117\2\ scan0135 | |
| Date | 1st November 1936 | |
| MASS PRODUCTIONS EFFECT ON COST FROM MR CHAS ENGELBACH'S PAPER READ BEFORE THE INSTITUTE OF THE MOTOR TRADE Nov 1936 £ PER CAR TRADE S.P. TRADE S.P. WITH 150% LABOUR CHARGE + 10% PROFIT LABOUR WITHOUT CHARGE MATERIAL TOOL COST £ TOOL COST | ||