A farmer made a contract in April to sell to a grain dealer forty thousand bushels of corn to be delivered in October. On June 3, the farmer unequivocally informed the grain dealer that he was not going to plant any corn, that he would not fulfill the contract, and that, if the buyer had commitments to resell the corn, he should make other arrangements. The grain dealer waited in vain until October for performance of the repudiated contract. Then he bought corn at a greatly increased price on the market in order to fulfill commitments to his purchasers. To what damages, if any, is the grain dealer entitled? Explain.