Environmental Requirements Tasks are regularly performed inside and/or outside with potential for exposure to adverse conditions, such as dirt, dust, pollen, odors, fumes and/or poor ventilation, wetness, humidity, rain, temperature, and noise extremes, machinery and/or moving vehicles, vibrations, electric currents, animals/wildlife, toxic/poisonous agents, gases or chemicals, oils and other cutting fluids, violence and/or disease, or pathogenic substances. Knowledge of principles and methods for showing, promoting, and selling products or services including marketing strategy and tactics, product demonstration, sales techniques, and sales control systems.