Write a procurement brief using only the supplied frozen official sources. The customer requires eligible EU inference residency and uses the Responses API. Do not browse, invent measurements or assume a subscription supplies API tokens. Cite source IDs such as S3 in the memo.

Evaluate two request shapes, with billed output already including reasoning:
A: 80,000 cached input + 20,000 ordinary input + 5,000 output tokens, no cache writes.
B: 280,000 ordinary input + 8,000 output tokens, no cached input or cache writes.
Apply the 10% regional-processing uplift to both tiers. Compute Standard cost, Ultrafast cost, extra cost, and break-even useful waiting time saved at USD60/hour for each shape. Also compute the regional token cost of 1,000 shape-A requests, with 900 Standard and 100 Ultrafast.

Return one JSON object with keys:
"A": {"standard_usd": number, "ultrafast_usd": number, "premium_usd": number, "break_even_seconds": number},
"B": the same four numeric keys,
"mixed_1000_usd": number,
"sol_ultrafast_tpm": {"Build": integer, "Launch": integer, "Grow": integer},
"memo": a 250-450 word string explaining eligibility, plan-vs-API access, US/EU Sol versus Astra distinction, the whole-request long-context threshold, cache-write accounting, reasoning billing, meaning of TPM, absence of a numerical Sol speed guarantee, and a practical conditional recommendation. Do not apply Astra's up-to-8x statement to Sol. Mention the included-versus-paid subscription usage multipliers. Clearly distinguish calculated break-even times from measured savings. Cite the supplied source IDs for factual claims.
