Keithric Thomas appeals the 121-month sentence imposed following his guilty-plea conviction of one count of conspiring to distribute in excess of 50 grams of cocaine base. Thomas argues that the district court erred in determining that he was responsible for 11 kilograms of “crack” cocaine because the information relied on by the district court lacked corroboration or indicia of reliability.

Thomas has not shown that the drug quantity information contained in the PSR was “materially untrue, inaccurate or unreliable.” See United States v. Angulo, 927 F.2d 202, 205 (5th Cir. 1991). The district court’s finding as to drug quantity is plausible in light of the record viewed as a whole and thus is not clearly erroneous. See Burton v. United States, 237 F.3d 490, 500 (5th Cir. 2000).

In a supplemental letter brief filed after the Supreme Court’s decision in United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), Thomas contends that the district court violated the Sixth Amendment by enhancing his sentence, pursuant to a mandatory application of the sentencing guidelines, based on factual findings not found by a jury or admitted by him. He also contends that the district court erred under Booker by applying the guidelines mandatorily. Thomas concedes that these arguments are subject to plain error review because they are raised for the first time on appeal.

Thomas argues that his case should be remanded for resentencing because it cannot be determined whether the district court would have imposed the same sentence under an advisory scheme. Thomas has failed to show that the sentencing *708 judge would have reached a significantly different result as to his sentence if sentencing under an advisory scheme. See United States v. Mares, 402 F.3d 511, 521 (5th Cir.), petition for cert. filed (Mar. 31, 2005) (No. 04-9517). Here, as in Mares, “there is no indication in the record from the sentencing judge’s remarks or otherwise that gives us any clue as to whether [ ]he would have reached a different conclusion.” Mares, 402 F.3d at 522. Accordingly, Thomas has not met the plain error standard. See id.

AFFIRMED.