However, as seen in the case of R v Clarke (1927) where Clarke, unaware of the reward for this performance, made statements to the police which led to the conviction of two murderers; since his motive was to prove his innocence and not in exchange for the offering, he could not claim the reward. Therefore, if the recipient accepts the offer through fulfillment, ignoring the offer, it will be invalid. Likewise, unbeknownst to Peter that John had sent his counteroffer the day before, Peter sent a fax specifying that his “cement price of $100 per bag includes shipping.” Even if Peter's fax is identical to John's offer, it does not constitute acceptance because he was unaware of the counteroffer; in turn this fax constitutes a new offer and not an acceptance. Offers are dissolved when a total rejection has taken place. John didn't understand the cost of charging for delivery; therefore the acceptance occurred without the knowledge of the offer meaning that a current contract was invalid. Upon receiving Peter's new offer, John immediately responded via fax, stating: "Reject your offer of cement at $100 per bag, including shipping..." This revoked the offer made by Peter.