The relationship between economic and administrative data as stated in the numerous tablets found throughout Mesopotamia and the mechanisms of calculation as evidenced by the mathematical corpus is poorly understood. Modern scholars have seldom attempted to cross the divide between studies of the myriad published documents dealing with the economic and administrative apparatuses of the ancient Mesopotamian cities on the one hand, and the mathematical texts produced and used within school environments on the other. Few adequate tools have been produced to detect this connection. This chapter marks the beginning of an effort to bridge the gap, so to speak. It attempts to compare procedures presented in mathematical materials and used in the scribal curricula to the mechanisms restored in a real economic document of the Old Babylonian period, YBC 7473, by analyzing a discrepancy. A central question surrounds the reading of this text and the analysis of the discrepancy: Can we account for the measurement values found in an economic text if we start from the assumption that the scribe who produced this text was trained using texts similar to those found in mathematical sources?