I concur in the result for the reasons that 1) appellant, having pled guilty, may not raise non jurisdictional arguments on appeal, Commonwealth v. Riviera, 254 Pa.Super. 196, 385 A.2d 976 (1978); and 2) the sentence and the reasons therefor are in compliance with Commonwealth v. Riggins, 474 Pa. 115, 377 A.2d 140 (1977), and its progeny.