¶1MEMORANDUM OPINION
¶2Petitioner contends the Workers’ Compensation Court, sitting en banc, erred in vacating that portion of the trial court *986award which commuted part of a permanent total disability benefit award to a lump sum. The en banc court vacated the lump sum portion of the award as contrary to law.
¶3Respondent cites 85 O.S.1981 § 41(B) and Rea v. Big Chief Drilling Co., 673 P.2d 515 (Okl.App.1983), as supporting the modification of the trial court order.
¶4The Legislature provided in 85 O.S. 1981 § 41(A), in pertinent part:
... Whenever an injured person receives an award for permanent partial, 'permanent total disability, or death benefits, the injured employee or claimant, for good cause shown, may have the award commuted to a lump-sum payment by permission of the Court. The lump-sum payment shall not exceed Four Thousand Dollars ($4,000.00) or twenty-five percent (25%) of the total award, whichever is the larger sum_ (Emphasis added).
¶5The Legislature also provided, in 85 O.S. 1981 § 41(B), in pertinent part:
... In proceedings to enforce claims for total permanent disability, the compensation under the provisions of the Workers’ Compensation Act shall be payable periodically and shall be so provided in any award made thereon. Total permanent disability awards shall not be commuted to a lump-sum payment except as to legal services as provided herein_ (Emphasis added.)
¶6On the surface, these provisions seem to conflict. A careful reading of 85 O.S.1981 §§ 41(A) and (B), with an awareness of the types of procedures available in the Workers’ Compensation Court, shows there is no conflict.
¶7The hearing resulting in an award of benefits and “proceedings to enforce claims” are two separate procedural phases. The Legislature has provided, in 85 O.S.1981 § 41(A), that when the original award is made, the trial court may commute a portion of the award to a lump sum if good cause is shown by the injured employee or claimant.
¶8If the award is not timely paid, the employee or claimant then has the right to initiate a proceeding to enforce the award by certifying the matter to the district court for collection proceedings. In this second situation, the Legislature has provided, in 85 O.S.1981 § 41(B), that the award shall not be commuted into a lump sum except as to the payment of legal fees.
¶9In allowing for the commutation of a portion of the initial award to a lump sum, the Legislature provided, in 85 O.S.1981 § 41(A), that:
Such commutation [of the award to a lump- sum] shall be in addition to any commutation to a lump-sum payment for legal services. (Emphasis added.)
¶10This language would be superfluous in the case of a total permanent disability award if 85 O.S.1981 § 41(B) were to be construed as prohibiting all commutations of the award to a lump sum.
¶11The Legislature will not be presumed to have committed a vain and useless act. In re Supreme Court Adjudication, etc., 597 P.2d 1208, 1210 (Okl.1979). Statutes should be construed to render every word and sentence operative, not so as to render portions of a statute nugatory. State ex.rel. Thompson v. Ekberg, 613 P.2d 466, 467 (Okl.1980).
¶12The commutation of a total permanent .disability award to a lump sum is allowed by 85 O.S.1981 § 41(A) and is not prohibited by 85 O.S.1981 § 41(B). In so far as the en banc court vacated the commutation of the award to a lump sum, it erred in applying 85 O.S.1981 § 41(B).
¶13The lump sum award of $5,000 does appear to exceed the limitation of the amount which may be commuted to a lump sum pursuant to 85 O.S.1981 § 41(A). The computation of an award is within the unique province of the Workers’ Compensation Court. This matter is remanded for a determination of whether a lump sum of $5,000 exceeds the limitation of lump sums to the larger of $4,000 or 25% of the total permanent disability award, and for the entry of a lump sum award which is both *987within the statutory guidelines and according to the evidence.
¶14The appeal having been found meritorious, Respondent’s request for costs and attorney fees is denied.
¶15ORDER VACATED AND CASE REMANDED.