Final answer:
Understanding business investment is crucial for managers selling capital equipment and big-ticket industrial services.
Step-by-step explanation:
For managers selling capital equipment and big-ticket industrial services, understanding the concept of business investment is absolutely fundamental to their success. Business investment refers to the spending on new equipment, facilities, or structures made by firms in order to expand their operations and generate profits. This concept is crucial because it allows managers to make informed decisions about allocating financial capital and planning for future growth.