If an agent is authorized to borrow a specific amount of money on behalf of the principal for the purchase of a measure of wheat, and the agent carries out the transaction, who is responsible for the debt?

Primary text

If an agent is authorized to borrow a thousand units of currency on behalf of the principal for a measure of wheat, and the agent executes this, the principal owns the price, and the agent is a guarantor for his principal, as previously established in related matters.