Roy B. Kester, Accounting theory and practice… (1922)
“ As competition becomes keener and the margin of return per unit of product becomes smaller, he has to increase his volume of business to secure the same amount of profit as when he did a lesser volume of business.To produce goods it is necessary to use the saved wealth of former periods to pay the expenses of materials, labor, management, etc., of the present period. One must consume wealth to produce wealth. After his product is made, he must seek the best market for its exchange or sale. ”
