\fMary says that she behaved reasonably in entering the contract of purchase and sale with Mr. Nickel because she had to close on her contract with the Billys. Mary says that she is entitled to the difference between the amount she would have received from the defendant on her contract of purchase and sale, $845,000, and the amount she received from Mr. Nickel of $670,000, less the sales commission, a net loss of $169,356.25