How to say “Politically criticize excessive charges” professionally

Level 1: I've flagged a few line items on the latest expenditure report that appear higher than anticipated. Could we schedule a brief review to ensure alignment with our current budget projections and strategic priorities?

Level 2: While reviewing the recent financial statements, I noted several charges that warrant closer examination against our established budget. Perhaps we could explore opportunities for cost optimization or clarify the rationale behind these specific allocations.

Level 3: Per the Q3 financial overview, certain cost centers have demonstrably exceeded their projected allocations, creating a notable variance from our initial fiscal planning. I've highlighted these discrepancies for your review, confident that adherence to our documented `budgetary guidelines` remains a paramount objective.

Level 4: These specific charges significantly impact our current budget and could jeopardize project funding if not addressed promptly. We need a clear strategy to either justify these costs or implement immediate corrective actions to prevent further financial strain.

Level 5: Your budget. Your problem.

Level 1: Upon reviewing the latest invoice, we've identified certain charges that warrant further clarification to ensure they align with our agreed-upon `statement of work`. Could you provide additional details on these specific items?

Level 2: To maintain transparency and ensure our billing accurately reflects the value delivered, we'd appreciate an opportunity to discuss several line items. This will help us confirm all charges are consistent with project parameters and your expectations.

Level 3: As per the mutually executed `Master Services Agreement` and the `Statement of Work` v1.2, we've cross-referenced all incurred costs. Certain charges appear to fall outside the scope of agreed deliverables or exceed predefined rate cards, requiring a formal reconciliation process.

Level 4: These specific charges are outside the scope of our contract and were not pre-approved. We will need to either remove them from the invoice or establish a new agreement for these additional services before processing payment.

Level 5: You signed the contract.

Level 1: I'm reviewing our shared project expenditures and noticed a few items that seem unusually high. Could you provide some context around these charges so I can better understand their necessity for our joint deliverables?

Level 2: To ensure we maintain optimal budget adherence for our collaborative efforts, I'd like to revisit some of the recent charges. Perhaps we can identify areas where we might streamline our spending without compromising project quality.

Level 3: Consistent with our `resource allocation guidelines`, I've cross-referenced recent project charges against the original `scope of work`. There appears to be a divergence in certain expenditure categories, which, while perhaps individually minor, collectively impact our shared fiscal bandwidth.

Level 4: These charges are directly impacting our shared budget and our ability to complete remaining tasks within the allocated funds. We need to clearly define whose responsibility these costs fall under and adjust accordingly.

Level 5: Not my budget to blow.