Indicate whether each of the following costs of an automobile manufacturer would be classified as PRIME COST, CONVERSION COST OR BOTH
a. Windshield
b. Engine
c. Wages of assembly line worker
d. depreciation of factory equip
e. factory machinery lubricants
f. tires
g. steering wheel
h. salary of painting supervisor

Identify whether each of the following costs should be classified as product costs or period costs.
a. manufacturing overhead
b. selling expenses
c. administrative ex[enses
d. adverstising expenses
e. direct labor
f. direct material