Peter wrote to Alan and asked him to buy 200 ladies Society Brand dresses for him at not more than $60 per dress.

Alan went to Toselli warehouse and chose 200 Society Brand dresses. He did not tell Toselli that he was acting on behalf of anyone. Alan signed a contract in his own name for the purchase of 200 dresses at $60 per dress.

On discovering this transaction, Peter informed Toselli that he was Alan's principal and demanded that Toselli deliver the dresses to him. Toselli refused, claiming that the contract was with Alan and would deal only with Alan.

according to the Law of Agency (Australia)

Advise Peter of any rights he may have against the above parties in regard to the contract of 200 dresses at $60 per dress.

(b) What would your advice be if the contract price for the dresses had been $67?

In your answer, you are required to refer to relevant legal authority