If the cost to buy a part is less than the direct material,direct labor,and incremental overhead cost of making the part,the company should buy the part.

Direct Material

Raw materials that are directly attributable to the production of goods, essential in determining the cost of goods sold.

Direct Labor

Direct Labor refers to the work of employees that is directly associated with the production of goods or the provision of services, distinguishable as wages for hands-on work.

Incremental Overhead

Additional overhead costs that arise due to a new activity or an increase in existing activities within a company, not previously budgeted or accounted for.