See where discounting erodes margin, deal by deal

**Objective:** Audit how `{product-name}` has been priced over the last `{lookback-days}` days (default 90) and flag lines sold more than `{discount-threshold}`% (default 15) below list.

**Step 1: The reference price**

Call `dynamics-365-sales-get-products` with `name` = `{product-name}` (retry with `name.contains`; if several match, list them and stop). Note `list-price`, `standard-cost` and `default-price-list`. Then call `dynamics-365-sales-get-productpricelevels` with `product` = the product name to get the amount on each price list, and `dynamics-365-sales-get-pricelevels` to see which of those price lists are active today (by `start-date`, `end-date` and `status`).

**Step 2: The prices actually used**

With the product name, call:

* `dynamics-365-sales-get-quotedetails` with `product-name`
* `dynamics-365-sales-get-salesorderdetails` with `product-name`
* `dynamics-365-sales-get-invoicedetails` with `product-name` and `created-on.from` = the lookback start
* `dynamics-365-sales-get-opportunityproducts` with `product-name`

Keep lines inside the lookback window (by `created-on` where the tool returns it).

**Step 3: Compute the discount**

For each line, the effective unit price is `extended-amount` divided by `quantity`. The discount is the percentage below the price-list amount (or the list price if the line's price list is unknown). Flag lines above the threshold, and any line below `standard-cost`.

**Step 4: Report**

1. Reference prices: list price, standard cost, and the amount on each active price list.
2. Summary per source (opportunity, quote, order, invoice): lines, quantity, average effective price, average discount.
3. Flagged lines: source, parent (opportunity, quote, order or invoice name), salesperson, quantity, effective price, discount %, manual discount, and whether it is below cost.
4. The salespeople with the most flagged lines.

**Rules & Guidelines:**

* This prompt is read-only. Do NOT call any create or update tool: `dynamics-365-sales-create-account`, `dynamics-365-sales-create-contact`, `dynamics-365-sales-create-lead`, `dynamics-365-sales-create-opportunity`, `dynamics-365-sales-create-case`, `dynamics-365-sales-create-task`, `dynamics-365-sales-create-note`, `dynamics-365-sales-create-phone-call`, `dynamics-365-sales-update-account`, `dynamics-365-sales-update-contact`, `dynamics-365-sales-update-lead`, `dynamics-365-sales-update-opportunity`, `dynamics-365-sales-update-case`.
* Do not compare prices across currencies; if the price lists use different currencies, audit each currency separately.

**Validation:**

* If the product is not found, say so and stop.
* If `{discount-threshold}` or `{lookback-days}` is blank or invalid, use the default.