A broker has earned his commissions when he has presented a customer whom the owner accepts, and evidences such acceptance by entering into an enforceable, binding contract; the action of the vendor in releasing a vendee from his obligations, for reasons suiting his own convenience, can not affect the right of the broker to recover his commissions. Packer v. Sheppard, 127 I11. App. 598; Ward v. Cobb, 148 Mass. 518, 20 K E. 174; Beck with-Anderson Co. v. Allison, 147 P. 482, 26 Cal. App. 473; Levy v. Griffith, 74 S. 613, 113 Miss. 659.