Daniel Rios Melendez pleaded guilty to one count of possession with intent to distribute heroin and was sentenced to 92 months in prison. He challenges the district court’s finding that he was responsible for 117.04 grams of heroin. According to the presentence report, police began investigating Melendez for heroin trafficking in Midland, Texas. They learned that he made numerous trips to Presidio, Texas, and returned with one or two ounces of heroin that he distributed in Midland. Border patrol agents confirmed that Melendez often crossed the border at Presidio into Mexico and back into the United States between February and December 2008. Police subsequently apprehended Melendez returning to Midland from Pre-sidio with 6.16 grams of heroin. Melendez admitted traveling to Mexico 19 times during the approximately one-year period to obtain heroin for resale in the United States. He also admitted that he was apprehended carrying approximately eight grams of heroin.

The drug quantity for which the defendant is responsible is a factual finding that is reviewed for clear error. United States v. Burns, 526 F.3d 852, 859 (5th Cir. 2008); United States v. Posada-Rios, 158 F.3d 832, 878 (5th Cir. 1998). A factual finding is not clearly erroneous if it is plausible in light of the record as a whole. United States v. Williams, 520 F.3d 414, 422 (5th Cir.), cert. denied, — U.S. -, 129 S.Ct. 111, 172 L.Ed.2d 89 (2008). The district court may rely upon the information in the presentence report, and the defendant bears the burden of demonstrating that the information in the presentence report is materially untrue. United States v. Alford, 142 F.3d 825, 831-32 (5th Cir. 1998).

Melendez asserts that his first 18 trips to Mexico were not relevant conduct because there was no evidence that he actually obtained heroin or took substantial steps toward obtaining the drug during those trips. He ignores the evidence in the presentence report that indicates that he often returned to Midland from Presi-dio with one to two ounces (28 to 56 grams) of heroin, and he fails to demon *579 strate that the evidence is materially untrue. Alford, 142 F.3d at 831-32. The district court’s conservative finding that Melendez possessed 6.16 grams of heroin on each of the 19 trips for a total of 117.04 grams is plausible in light of the record as a whole which includes his own admissions in the factual basis. 1 See Williams, 520 F.3d at 422. AFFIRMED.