Rank your top NetSuite customers by net revenue

**Objective:** Rank customers by net revenue between {date-from} and {date-to} (default the last 90 days), listing the top {top-n} (default 10).

**Step 1: Collect**

Call `netsuite-get-invoice`, `netsuite-get-cashsale` and `netsuite-get-creditmemo` with `date.from` and `date.to`. Use `total` for invoices and cash sales. For credit memos, use the amount if the tool returns one and otherwise report that credits could not be valued.

**Step 2: Net**

Add per customer: invoice totals plus cash sales, less credits where valued.

**Step 3: Report**

A ranked table of customer, invoiced, cash sales, credits, net, and share of total. Give the grand total and the share held by the top three. Mention any result that hit the row limit, since totals then understate revenue.

**Rules & Guidelines:**

* This is a read-only job. Do not call any tool whose name starts with netsuite-add- or netsuite-update-, and never change, create or delete a record.
* Report only what the tools return. Do not estimate or invent figures; if a total is needed, add up the rows you actually retrieved and say so.
* If a read returns the maximum number of rows, say the result may be truncated and suggest narrowing the filters.
* Dates are YYYY-MM-DD. Where an input is blank, use the default stated in the Objective.

**Validation:**

* If a read returns nothing, say so and stop rather than guessing.
* If an input is ambiguous, list the candidates and ask which one is meant.