A method of manufacturing a nozzle plate of a spray apparatus is provided. The mobile computer system includes a display for viewing at least a portion of the model maintained in the feedlot layout database. The selective catalytic reduction device treats exhaust from the engine. A controller is configured to control the engine, MGU, compressor, and air handler unit, alone or in combination, to heat or cool air supplied to a building and water in the tank, and to selectively charge at least one auxiliary device such as a battery of an electric vehicle via the MGU.