Tends machines and equipment that automatically mix ingredients to make straight and sponge doughs according to formula: Moves controls and turns valves to adjust metering devices that weigh, measure, sift, and convey water, flour, and shortening into mixer, and that measure and dump yeast, vitamins, yeast food, sugar, salt, and other ingredients into mixing machine. Sweep floor, wash the trays, tables, wash carts, short simple conveyor, squeegee the water off the floor, throw out garbage.