SAN FRANCISCO - APRIL 21: Boudin Bakery master baker Fernando Padilla carries a bag of flour that will be dumped into a mixer to make sourdough bread at Boudin Bakery April 21, 2008 in San Francisco, California. Boudin, the oldest continuously operating business in San Francisco and the original Sourdough French bread maker is being forced to raise prices on its popular sourdough bread as the cost of flour has nearly tripled in the past year due to high wheat prices caused by strong worldwide demand and increased price speculation. (Photo by Justin Sullivan/Getty Images)