In 1930, the beginning of the Golden Age's first full decade, the average U.S. feature film cost $375,000 to produce. A broad range of Hollywood motion pictures occupied the B-movie category: The leading studios made not only clear-cut A and B films, but also movies classifiable as "programmers" (also "in-betweeners" or "intermediates"). These were films that "straddle[d] the A-B boundary," in Taves's description. During the era of the double feature, "[d]epending on the prestige of the theater and the other material on the double bill, a programmer could show up at the top or bottom of the marquee." On Poverty Row, many B's were made on budgets that would have barely covered petty cash on a major's A film, with costs at the bottom of the industry running as low as $5,000. By the middle of the 1930s, the double feature was the dominant exhibition model across the country, and the majors responded. In 1935, B-movie production at Warner Bros. was raised from 12 to 50 percent of the studio's total output. The unit was headed by Bryan Foy, known as the "Keeper of the B's." At Fox, which also shifted half of its production line into B territory, Sol M. Wurtzel was similarly in charge of more than twenty movies a year during the late 1930s. Loew's, the parent company of MGM, announced in 1935 that it would run double features at all of its subsequent-run theaters. A low-cost production unit was established at the studio under Lucien Hubbard, "although the term "B movie" was strictly taboo at Metro." Columbia, which primarily served the B-movie market, expanded annual production from thirty pictures to more than forty. A number of the top Poverty Row firms were consolidating: Sono Art joined with another company to create Monogram Pictures early in the decade. In 1935, Monogram, Mascot, and several smaller studios merged to form Republic Pictures. After little more than a year, the heads of Monogram pulled out and revived their company. Into the 1950s, Republic and Monogram released films that tended to be roughly on par with the low end of the majors' output. Less sturdy Poverty Row concerns—with a penchant for grand sobriquets like Conquest, Empire, Imperial, Supreme Pictures and Peerless—continued to churn out dirt-cheap quickies.