Final answer:
The arrangement described is an Open Listing Agreement, where multiple brokers can try to sell Sandy's home but only the one who finds a buyer gets the commission.
Step-by-step explanation:
The type of agreement in place where Sandy has asked multiple real estate licensees from different firms to help sell her home, and only the licensee who brings a buyer will earn a commission, is known as a Open Listing Agreement. In an open listing, the seller retains the right to employ any number of brokers as agents. When a broker from any of the firms successfully secures a buyer, that broker receives the commission.
If the seller finds a buyer independently, no commission is owed to any broker. This contrasts with an Exclusive Right to Sell Agreement, where one brokerage has the exclusive rights to sell the property, a Net Listing Agreement, which involves the broker keeping the excess over the seller's desired net amount, and a Multiple Listing Agreement, which is broader in scope and involves a collaborative approach amongst multiple brokers.