Contracts with brokers for the sale of real property are presumptively entered into in good faith, and it is the province of the courts, in administering the law as to such contracts, to carefully protect the interests of the parties according to the true spirit and meaning of the contracts. Corder v. O'Neill, 176 Mo. 401, 75 S. W. 764. Where two parties make a parol contract, and they disagree about its terms, it is the duty of the court, in an action arising thereon, to explain to the jury, when requested, the legal effect of each party's recollection of the terms of the same. Stewart v. Fowler, 37 Kan. 677, 15 P. 918. Fulfillment of an owner's contract entered into by a landowner for the payment of commissions will not, where it was 534 not illegal, be interfered with by the courts. Michael v. White, 181 S. W. 130, 121 Ark. 315.