shapes also advanced less than they had a month earlier. The indexes for building paper and board and for hardwood lumber turned down in February. Prices for cement fell more than in January.   ;   ;   ; The index for materials and components for construction edged up 0.1 percent following a 0.2-percent increase in January. In February, rising prices for steel mill products, plumbing fixtures and brass fittings, concrete products, heating equipment, and plastic construction products outweighed price declines for nonferrous wire and cable, treated wood, gypsum products, asphalt felts and coatings, and prefabricated wood buildings and components.   ; The basic industrial materials index advanced 2.7 percent after increasing 1.6 percent in January. The gold ores index turned up 9.2 percent following a 3.7-percent decline in the preceding month. Prices for both copper and aluminum base scrap fell less in February than they had in the previous month. The indexes for wastepaper; construction sand, gravel, and crushed stone; and phosphates rose more than they had a month earlier. By contrast, price increases for iron and steel scrap slowed to 9.1 percent in February from 11.8 percent in January. The raw cotton index turned down after advancing in the prior month.   ; The Producer Price Index for the Net Output of Total Trade Industriesdeclined 0.3 percent in February compared with a 1.4-percent increase in January. (Trade indexes measure changes in margins received by wholesalers and retailers.) Most of this downturn can be traced to margins received by gasoline stations, which dropped 24.8 percent in February following a 44.2-percent jump in the prior month. The margin indexes for merchant wholesalers of durable goods, grocery stores, shoe stores, and automobile dealers also fell after rising in January. Conversely, margins received by merchant wholesalers of nondurable goods advanced 4.1 percent in February following a 0.9-percent decrease a month earlier.   ; Read the Producer Price Index news release in full here.