THE THREE FULL-LINE PRICES 1. CaearesT Fuil-LINE PricE~The lowest price at which any class of goods can be pro- duced and sold, provided the goods are of such good quality that customers will buy them again and again. >». BesT-sELLING FuLL-LINE PricE.—The inter- mediate price at which all of our customers buy at one time or another, at which most of our customers buy all of the time, and at which we, consequently, sell the most goods. 3. Higaest Furi-LINE PRICE.—The highest price at which their incomes will allow the great majority of our customers to buy.