Where the written contract by which defendant employed plaintiff as broker to sell lands fixed the selling price per acre, and provided for the payment of a certain sum in cash by any purchaser obtained, evidence that the purchaser obtained by plaintiff under the offer to buy at the price named in the contract did not have in his possession at the time of the offer sufficient funds to make the cash payment required, but could have obtained them on the morning of the next day, was sufficient to show that he was able to buy. McDermott v. Mahoney,

139 Iowa, 292, 106 N. W. 925, affirmed 115 N. W. 32. See also Sec. 464.