As an inventory associate, you are auditing stock adjustments in a warehouse management system. The system uses signed integers to log bulk changes to inventory. You encounter two automated adjustment calculations that need to be manually simplified: $-9(6)$ and $-9(-6)$. According to the rules for multiplying integers, what are the simplified values of these two expressions, respectively?

In a corporate accounting system, automated entries for debt and credit adjustments are often represented as multiplication expressions. To ensure the ledger balances correctly, match each mathematical expression or general sign rule with its corresponding simplified value or product outcome.

Auditing Billing Adjustments

In a corporate inventory system, reversing 9 instances of a 6-unit deduction is represented by the mathematical expression $-9(-6)$. The simplified value of this expression is 54.

Auditing Automated Stock Adjustments