Essay

Inventory Adjustment Principles

An operations manager uses the expression 20z20 - z to reconcile stock levels. When evaluating this expression, substituting z=12z = 12 results in 88, while substituting z=12z = -12 results in 3232. In a brief essay, recall and describe the mathematical rule that explains why subtracting the negative value (12-12) leads to an increased result. Provide the step-by-step calculation for the z=12z = -12 scenario to support your explanation.

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Updated 2026-04-20

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