The amount of an attorney fee to be awarded is a matter within the sound discretion of the trial court. ( Contractors Labor Pool, Inc. v. Westway Contractors, Inc. (1997) 53 Cal. App. 4th 152, 169 [61 Cal. Rptr. 2d 715].) The trial court is the best judge of the value of professional services rendered in its court, and while its judgment is subject to our review, we will not disturb that determination unless we are convinced that it is clearly wrong. (Serrano v. Priest (1977) 20 Cal. 3d 25, 49 [141 Cal. Rptr. 315, 569 P.2d 1303]; Reveles v. Toyota by the Bay (1997) 57 Cal. App. 4th 1139, 1153 [67 Cal. Rptr. 2d 543].) The only proper basis of reversal of the amount of an attorney fees award is if the amount awarded is so large or small that it shocks the conscience and suggests that passion and prejudice influenced the determination. (Reveles v. Toyota by the Bay, supra, at p. 1153.)