If the value of the gift exceeds $100, you will be required to pay duty. If you have goods you intend to sell in the U.S., they will most likely be subject to duty, unless they are eligible for duty-free treatment under an international trade agreement (GSP, NAFTA, etc.).
Specialization of labor is a powerful force in an economy, benefiting small and large businesses alike. Workers produce more when they occupy specialized roles, so businesses can offer higher quality products at lower prices.
This division of labor into small, specific tasks and the assignment of employees to do a single task is called specialization. The rationale for specialization is efficiency: It minimizes the time lost when workers shift from one task to another, and it facilitates training.