Which billing practices?

The parties in Acadian Diagnostic Laboratories v. Quality Toxicology, LLC disputed what the phrase “customary billing practices” meant in their contract. QT argued that it meant “the billing practices that [Acadian] habitually or usually used with its customers in general,” while Acadian “asserts that it agreed to use the billing practices that it habitually or usually used with QT.” The Fifth Circuit resolved this dispute by reference to the parties’ performance, finding that “the record is entirely one-sided,” and that Acadian’s interpretation was consistent with the parties’ performance both before and after the formatoin of their contract. No. 19-30320 (July 13, 2020).