[NOT FOR PUBLICATION--NOT TO BE CITED AS PRECEDENT] United States Court of Appeals For the First Circuit No. 98-1052 UNITED STATES, Appellee, v. LUIS MEDERA-CASTRO, Defendant, Appellant. No. 98-1053 UNITED STATES, Appellee, v. PEDRO CARRERA-GONZALEZ, Defendant, Appellant. APPEALS FROM THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF PUERTO RICO [Hon. Salvador E. Casellas, U.S. District Judge] Before Selya, Stahl and Lynch, Circuit Judges. Gilberto Figueroa-Rios and Gilberto Figueroa-Rios Law Officeon brief for appellant Luis Madera-Castro. Lydia Lizarribar-Masini on brief for appellant Pedro Carrera- Gonzalez. Guillermo Gil, United States Attorney, Jose A. Quiles- Espinosa, Senior Litigation Counsel, and Nelson Perez-Sosa, Assistant United States Attorney, on brief for appellee. September 14, 1998 Per Curiam. In these two companion cases, appellants challenge their convictions and/or sentences imposed following their guilty pleas to conspiring to distribute cocaine and crack and carrying a firearm during and in relation to a drug trafficking offense. We affirm appellants' convictions and sentences. I. Appeal No. 98-1052. Counsel for Luis Madera-Castro has submitted an Anders brief and motion to withdraw, asserting that there are no meritorious issues to be raised on appeal. See Anders v. State of California, 386 U.S. 738 (1967); 1st Cir. Loc. R. 46.4(a)(4). Defendant has not filed a separate brief, although he has been informed of his right to do so. We conducted a full examination of the proceedings, including the guilty plea and sentencing hearings, as required by Anders. Based on that examination, we agree with counsel that the appeal presents no issue having an arguable basis in law or fact. The transcript of the change of plea hearing demonstrates that the district court fully complied with Fed. R. Crim. P. 11, by properly advising defendant of his rights and insuring that the plea was voluntary. The undisputed facts support defendant's conviction of the crimes charged. The court properly applied the sentencing guidelines and imposed a sentence at the low end of the applicable guideline imprisonment range. Therefore, there are no arguable appellate issues as to defendant's conviction, plea or sentence. Counsel's motion to withdraw is granted, and appellant's conviction and sentence are affirmed. II. Appeal No. 98-1053. Pedro Carrera-Gonzalez appeals from his sentence imposed as to Count One of the indictment. He does not seek to vacate his guilty plea. Having stipulated in his plea agreement to a drug quantity yielding a base offense level ("BOL") of 24 and to a two-level upward adjustment pursuant to U.S.S.G. 3B1.4, for the use of a minor to commit the offense, appellant now objects for the first time that there is insufficient factual support for the same. He concedes that the failure to raise either claim below mandates "plain error" review. See Fed.R.Crim.P. 52(b); United States v. Olano, 507 U.S. 725 (1993). A. Drug Quantity. A preponderance-of-the-evidence standard applies to the sentencing court's determination of drug quantity. See United States v. Lindia, 82 F.3d 1154, 1161 (1st Cir. 1996). Carrera-Gonzalez contends that the district court erred by determining drug quantity in reliance solely upon the amounts of drugs charged in the indictment and stipulated to in the plea agreement. See Appellant's Brief, p. 10. The Sentencing Guidelines provide that the sentencing court "is not bound by [a] stipulation [of fact], but may with the aid of the presentence report, determine the facts relevant to sentencing." U.S.S.G. 6B1.4(d), p.s. (Nov. 1995). "Even though stipulations are expected to be accurate and complete, the court cannot rely exclusively upon stipulations in ascertaining the factors relevant to the determination of sentence. Rather, in determining the factual basis for the sentence, the court will consider the stipulation, together with the results of the presentence investigation, and any other relevant information." U.S.S.G. 6B1.4, comment. In this case, the district court did not rely exclusively on the stipulation in the plea agreement in determining drug quantity. The court also relied upon the presentence report. The PSR recounted the government's version of the facts: that between July 2, 1996 and July 18, 1996, Carrera-Gonzalez sold drugs in an amount of at least 400 grams, but not more than 500 grams. See PSR, p. 5. At the sentencing hearing, defense counsel indicated that there were no objections to the "excellent presentence report." Sent. Tr., p. 2. Having failed to object below to the PSR's findings, Carrera-Gonzalez is bound by them. See United States v. Benjamin, 30 F.3d 196, 197 (1st Cir. 1994). The court accepted the PSR as its findings of fact, as permitted by Fed. R. Crim. P. 32(b)(6)(D). In reliance upon the PSR's findings regarding the quantity of drugs sold by Carrera-Gonzalez, the district court properly calculated a BOL of 24. See United States v. Brewster, 127 F.3d 22, 28 (1st Cir. 1997) ("[F]actual averments contained in the PSI Report usually are deemed reliable enough to be used for sentencing purposes"). Under these circumstances, the district court's determination of drug quantity was not plain error. B. Section 3B1.4 Enhancement. The applicability of 3B1.4 is determined by reference to "relevant conduct." See U.S.S.G. 1B1.3(a). Therefore, contrary to appellant's assertion in his brief, the two-level increase did not require a finding that a minor was used in the sales made by appellant himself. Instead, the question is whether the use of minors was a "reasonably foreseeable act[] . . . of others in furtherance of the jointly undertaken criminal activity." U.S.S.G. 1B1.3(a)(1)(B). The record contains ample evidence to support a finding that the use of minors was "reasonably foreseeable." Therefore, it was not plain error for the district court to apply the two-level enhancement under U.S.S.G. 3B1.4, as stipulated to by appellant. Carrera-Gonzalez' sentence is affirmed. See Loc. R. 27.1.