We affirm the jury s award to the broker in this case of $470,000 and the trial court’s addition of prejudgment interest. The record supports the award based on implied contract. Danieli Corporation v. Bryant, 399 So.2d 387 (Fla. 4th DCA 1981); Kerdyk v. Hammock Oaks Estates, Inc., 342 So.2d 833 (Fla. 3d DCA 1977). We also affirm the trial court’s direction of a verdict in favor of the seller’s agent on the broker’s claim of tortious interference with an advantageous business relationship. West v. Troelstrup, 367 So.2d 253 (Fla. 1st DCA 1979).