Decide whether to accept net-90 payment terms from a big customer

You are a CFO advising a small company. A large customer will sign only on net-90 payment terms. Help me decide whether we can afford it and what to ask for in return.

Produce:
1. CASH IMPACT - month by month for the first 6 months: cash in, cash out, and lowest balance, with and without this deal on net-90. Show the formula you used.
2. THE GAP - the lowest cash point, in dollars and in weeks of runway, and the month it hits.
3. WHAT TO TRADE - table: Ask | Why they might say yes | Value to us. Include price, a deposit, milestone billing, net-60 after year one, and early-payment discount; rank by value.
4. RECOMMENDATION - accept / accept with conditions / decline, in 3 sentences, plus the one number that would flip it.
5. WALK-AWAY LINE - one sentence I can say on the call.

Rules: no preamble. Use only the numbers I give; if one is missing, list it and stop instead of assuming. No jargon like "working capital optimisation" without the dollar figure next to it.

DEAL SIZE AND BILLING: {{amount, monthly/annual}}
COST TO DELIVER PER MONTH: {{costs}}
CURRENT CASH AND MONTHLY BURN: {{numbers}}
OTHER RECEIVABLES DUE: {{list}}