A more thorough explanation:

Definition: A contract to sell is a legal agreement between two parties where one party agrees to sell a product or service to the other party at a future date. This contract outlines the terms and conditions of the sale, including the price, delivery date, and payment terms.

Example: John wants to sell his car to Jane. They both agree on the price and the delivery date, but they haven't exchanged any money yet. They sign a contract to sell, which outlines the terms and conditions of the sale. Once Jane pays John the agreed-upon amount, the contract will be fulfilled.

Explanation: The example illustrates a contract to sell between two parties for a car. The contract outlines the terms and conditions of the sale, including the price and delivery date. Once the buyer pays the seller, the contract will be fulfilled, and the sale will be complete.

Definition: Contractual duty refers to the legal obligation of a party to fulfill their responsibilities as outlined in a contract. This includes performing specific actions, providing goods or services, or making payments as agreed upon in the contract.

Example: Sarah hires a contractor to renovate her kitchen. The contract outlines the scope of work, the timeline, and the payment terms. The contractor has a contractual duty to complete the renovation according to the agreed-upon terms, and Sarah has a contractual duty to pay the contractor for their services.

Explanation: The example illustrates contractual duty in a construction contract. The contractor has a duty to complete the renovation according to the agreed-upon terms, and the homeowner has a duty to pay for the services rendered. Both parties are legally obligated to fulfill their responsibilities as outlined in the contract.