The allegation of a petition in an action for commission for procuring a purchaser for real estate, that defendant agreed that if plaintiff could procure a purchaser he would pay him all over $6,000 for which the property sold, and that plaintiff found a purchaser at $6,800, would include a sale either wholly or partly for cash. McCormick v. Obanion, 153 S. W. 267, 168 Mo. App. 606.