Bob, a salesperson at a Carpets Galore store, tells Dita, a customer, "Buy your carpet here, and I’ll install it for half of what the store would charge." Dita buys the carpet, which Bob in-stalls for half the store’s price. Bob keeps the money. Bob has breached

Answer is the duty of loyalty.

Refer below.

Explanation:

Bob, a salesperson at a Carpets Galore store, tells Dita, a customer, "Buy your carpet here, and I’ll install it for half of what the store would charge." Dita buys the carpet, which Bob in-stalls for half the store’s price. Bob keeps the money. Bob has breached the duty of loyalty.

Bob has breached the Duty of Loyalty.

Explanation:

Duty of loyalty described as a  fiduciary duty is the act of  responsibility by an individual  to behave in such a way that aligns with best interests of their company, it follows when individuals do not usurp corporate opportunities for their personal gain, avoiding  having a personal interest in transactions between the company  and another party and keeping  the company's information private.

A breached in the duty of loyalty which can be seen by Bob occurred when he involved himself in self-interested transaction with Dita for the sale of carpet.