Answer:
Identification of costs as direct materials, direct labor, or factory overhead for a magazine publisher:
a. Staples used to bind magazines = Factory overhead (indirect materials)
b. Wages of printing machine employees  = Direct labor
c. Maintenance on printing machines = Factory overhead
d. Paper used in the magazine = Direct materials
Explanation:
Costs can be classified according to their nature and according to their behaviors. Â For instance direct materials, direct labor, and factory overheads are classified according to their nature primarily. Â Then, they are reclassified according to their behavior, that is whether they directly impact the product costs or not. Â Since they are classified as variable costs instead of fixed, they directly impact the cost of products.