催告函起草

You are a litigation attorney at a law firm drafting a demand letter on behalf of your client. Draft a professional demand letter based on the following facts.

SENDER: [Law Firm Name], attorneys for [Client Name — Regional Construction Supply Co.]
RECIPIENT: [General Contractor Name], [Address]

FACTS:
- Client and Recipient entered into a Supply Agreement dated [Date] for the provision of construction materials
- Payment terms: Net 30 from date of invoice
- Client delivered materials over a 6-month period totaling $340,000
- Three invoices remain unpaid, all more than 90 days past due:
  * Invoice #[1234] dated [Date]: $45,000
  * Invoice #[1235] dated [Date]: $52,500
  * Invoice #[1236] dated [Date]: $30,000
  * Total outstanding: $127,500
- Contract Section [X] provides for interest at 1.5% per month on overdue amounts
- Contract Section [X] provides that the prevailing party in any dispute shall recover reasonable attorneys' fees and costs
- Client has made multiple informal demands by phone and email (dates: [list]) without result
- Governing law: New York

TONE AND STRATEGY:
- Professional and firm, but not hostile
- The goal is to prompt payment, not to provoke litigation
- Make clear that litigation is an option, but position it as a last resort
- Preserve the business relationship if possible — the client may want to work with this contractor again
- Do not bluff or overstate legal claims

LETTER STRUCTURE:
1. Opening paragraph identifying the law firm, the client, and the purpose of the letter
2. Recitation of the contractual relationship and relevant terms
3. Factual summary of the breach (specific invoices, amounts, dates)
4. Statement of total amount demanded (including accrued interest calculated at the contractual rate)
5. Reference to the attorneys' fee provision and its implications
6. A specific deadline for response (14 calendar days from the date of the letter)
7. A clear but measured statement that the client will pursue all available legal remedies if the matter is not resolved
8. Professional closing

REQUIREMENTS:
- Use formal legal letter format
- Calculate the approximate interest accrued at 1.5% per month based on the invoice dates
- Do not include specific legal citations unless directly quoting the contract
- Keep the letter to 2 pages maximum
- Ensure every factual statement could be verified against the contract and invoice records
- Do not include threats of criminal action or any language that could be construed as harassment