Answer:
1.The cost of a hard drive installed in a computer = Direct Material Cost
Explanation:
Direct Material relates to the basic inputs required to make the final good.
Here, for the information it is provided that, PC Works assembles custom computers, which are supplied by various manufacturers.
Since the main business of PC Works is to assemble the computers, installing a hard disk will be the main component of service, thus, It is part of direct material.