This is a direct appeal from the sentence given appellant following his conviction upon his plea of guilty but mentally ill to the murder of his parents. Ind. Appellate Rule 4(A)(7). Ind.Code Ann. Â§ 35-42-1-1 (West Supp. 1991); Ind.Code Ann. Â§ 35-36-2-5 (West Supp. 1991). The trial court imposed an aggregate sentence totalling 120 years. Appellant claims this sentence is manifestly unreasonable. Ind. Appellate Rule 17(B).