Into which of these 3 elements of manufacturing cost would each of the following be classified? either choose direct materials, direct labor, or manufactured overhead a. Tubing used in manufacturing bikes. Answer = b. Wages paid by an automobile manufacturer to employees who test-drive completed automobiles. Answer = c. Property tax on machinery. Answer = d. Gold button used by a jewelry manufacturer. Answer = e. Wages of assembly line workers who package frozen food. Answer = f. Salary of plant superintendent. Answer = g. Electricity used in factory operations. Answer = h. Salary of a nurse in a factory first-aid station. Answer =