Training workers to do their jobs properly and working with suppliers to improve the quality of material they supply to you are examples of

prevention costs.

Explanation:

Prevention cost refers to the investment made by the entrepreneur to reduce possible defects in his production. In this case, the entrepreneur wants to develop processes that help his company to reach a high quality standard. An example of this type of cost can be seen in the question above, where the entrepreneur decides to invest in training for workers to do their job correctly and invests in working with suppliers to improve the quality of the material they supply. With this, the entrepreneur avoids the appearance of some defects in his production and guarantees the quality of his products.

answer; comparing the additional benefits and costs;