2-1A - Cost Classification The following are costs of Big Rig Trucks, a manufacturer of large diesel vehicles. 1.) Aluminum used in manufacturing each truck's body. 2.) Factory supervisor's salary. 3.) Company president's salary. 4.) Cleaning supplies used for daily cleanup. 5.) Wages of workers who build the engines. 6.) Patent lawyer's costs. 7.) Accounting fees. 8.) Shipping paid on deliveries to customers. Required: For each cost above, identify whether it is Variable or Fixed, and which category of product or period cost it belongs to DM/DL/MOH/ Selling/Admin/R\&D