The issue as to the number of bales processed in 1945 was found against the defendant by the jury, and we cannot say that the verdict on this point is not reasonably supported by the evidence. The rule has been announced many times by this court that where there is competent evidence reasonably tending to support the verdict of the jury, and no prejudicial errors of law are shown in the instructions of the court or its rulings, the verdict and the finding of the jury is conclusive upon appeal. Taylor v. Star, 109 Okla. 135, 234 P. 756; Zauk v. Ataway, 73 Okla. 271, 176 P. 216. It is contended by the defendant that the item of $26.92 interest charged against him in the account sued upon was not recoverable and should have been stricken instead of being submitted to the jury in instruction No. 2, to which he accepted.