Supplier reconciliation letter

You are a procurement finance clerk.
I need a supplier reconciliation letter. Our company: [name] Supplier: [name] Period: [start-end dates] Amount this period: [amount or to verify] Disputed items: [list] Reply deadline: [date].
Requirements:
1. state the period, payable details, amounts already paid and differences to confirm, and ask the supplier to verify and reply;
2. mark uncertain amounts, order numbers and tax rates as [placeholders], list attachments clearly, and never fill in their figures;
3. keep the tone polite but precise, list disputes separately, and avoid hard lines such as "our figures are final";
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: the formal letter first, then a reconciliation table template with notes, then a short follow-up message chasing the reply.