OPINION

On February 1, 2011, a jury convicted Hector Hugo Tovar-Sanchez of four controlled substance offenses, including conspiring to distribute cocaine in violation of 21 U.S.C. § 846. The United States District Court for the Eastern District of Pennsylvania sentenced Tovar-Sanchez to, inter alia, 200 months on each count, with the sentences to be served concurrently. This timely appeal followed. 1

The sole issue raised in this direct appeal is whether the District Court erred in its calculation of the drug quantity attributable to Tovar-Sanchez, which determined the applicable offense level and sentencing guideline range. Tovar-Sanchez does not dispute that he is accountable for the 17 kilograms of cocaine involved in the drug transactions that occurred during the period of the conspiracy, i.e., from March 2009 to August 5, 2009. Nor does he challenge the 13 kilograms of cocaine attributed to him as a result of a drug transaction that occurred in Delaware during the period of the conspiracy. Instead, Tovar-Sanchez argues that he should not have been held accountable for the 26 kilograms of cocaine involved in the six transactions in North Carolina that occurred after the conspiracy of which he was convicted. In his view, the 26 kilograms should not have been included in the calculation because they did not constitute “relevant conduct” under United States Sentencing Guideline § lB1.3(a)(2). 2

*201 Guideline § lB1.3(a)(2) provides that a defendant’s acts may be considered “relevant conduct” if such acts “were part of the same course of conduct or common scheme or plan as the offense of conviction.” U.S.S.G. § lB1.3(a)(2). The commentary to the guideline explains that the “same course of conduct” and a “common scheme or plan” are “two closely related concepts.” Id. cmt. n. 9 (2010). Ruling from the bench, the District Court noted that there were facts common to both the conspiracy conviction and the North Carolina transactions, including the modi oper-andi and the identities of the participants. It also pointed out the temporal proximity of the North Carolina transactions to the conspiracy. In support of these links between the North Carolina transactions and the conspiracy, the District Court relied on the description of the North Carolina transactions by Tovar-Sanchez’s cocon-spirator Emilio Quintero after finding his testimony credible. The District Court concluded that the North Carolina transactions qualified as “relevant conduct” as either part of the “same course of conduct” or a “common scheme or plan.”

Tovar-Sanchez argues that the District Court erred because there were factual differences between the transactions that occurred during the conspiracy and the transactions that occurred in North Carolina. In addition, Tovar-Sanchez challenges the District Court’s credibility determination, pointing out that Quintero was biased and was uncertain about some of his testimony.

We are not persuaded. There is no merit to Tovar-Sanchez’s attack on the District Court’s credibility determination. Anderson v. City of Bessemer, 470 U.S. 564, 575, 105 S.Ct. 1504, 84 L.Ed.2d 518 (1985) (noting the great deference accorded to a District Court’s findings based on credibility, and observing that a credibility determination “can virtually never be clear error” if the witness’s testimony is coherent, facially plausible, and not contradicted by extrinsic evidence). Furthermore, To-var-Sanchez acknowledges that the modi operandi of the conspiracy transactions and the North Carolina transactions were “similar” because both sets of transactions involved the transportation of drugs in a hidden compartment in a vehicle. Tovar-Sanchez does not dispute that the time interval between the conspiracy and the North Carolina transactions was short. Indeed, as he acknowledges, the timing suggests that the latter acts were connected to the conspiracy. Tovar-Sanchez further acknowledges that he and Quintero were involved in both the conspiracy and the North Carolina transactions. Thus, To-var-Sanchez’s argument recognizes that there is support in the record for the District Court’s findings. Because these findings support the District Court’s determination that the North Carolina transactions were, under Guideline § lB1.3(a)(2), part of a “common scheme or plan” or the “same course of conduct” as the conspiracy of conviction, we conclude that the District Court did not err by attributing the 26 kilograms of cocaine involved in the North Carolina transactions to Tovar-Sanchez for sentencing purposes.

We will affirm the judgment of the District Court.