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docs(parts): correct stale prices and reconcile the cost summary - #2

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docs(parts): correct stale prices and reconcile the cost summary#2
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docs/parts-price-corrections

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Checked each priced line in docs/PARTS.md against its vendor on 2026-08-22. Two prices had drifted and the Cost Summary did not agree with its own tables.

Price corrections

Item Doc said Vendor
OPS243-A $249 $224
IWR6843LEVM $150 $156.45 at TI (rounded to $156 to match the table convention)

Cost Summary did not reconcile

The summary disagreed with the tables it summarizes:

  • Core was listed at $355, but the three core rows summed to $425 at the old prices.
  • Power & Accessories was listed at $27 against line items summing to $29.

With the corrected prices, every category row now sums to its own line items:

Category Was Now
Core $355 $400
Power & Accessories $27 $29
Subtotal, no angle radar ~$400 ~$447
Angle radar $156 $162
Total with angle radar ~$556 ~$609

Most of that increase is the reconciliation rather than price drift. The OPS243-A actually came down $25; the summary was just under-reporting the tabled parts.

Also updated the "$156 vs $140" K-LD7 comparison line so it matches the corrected IWR6843 figure.

Availability note

Added a dated note that OmniPreSense currently lists the OPS243-A as "Available on backorder". It is the longest-lead and most expensive item, so it seems worth flagging before someone plans a build around it. Dated so it is clear when it was checked, and easy to drop if you would rather not track stock in the docs.

Docs-only; no code or tests touched.

Checked each priced line in PARTS.md against its vendor on 2026-08-22.

* OPS243-A is $224, not $249.
* IWR6843LEVM is $156.45 at TI, not $150. Rounded to $156 to match the
  table's existing convention.
* The Cost Summary did not agree with its own tables. Core was listed
  at $355 while the three core rows summed to $425 at the old prices,
  and Power & Accessories at $27 against $29. Every category row now
  sums to its line items, so the total with an angle radar is ~$609
  rather than ~$556.
* Updated the "$156 vs $140" K-LD7 comparison to match the corrected
  IWR6843 figure.

Also notes that OmniPreSense currently lists the OPS243-A as
"Available on backorder", dated so it is clear when it was checked. It
is the longest-lead item in the build, so it is worth knowing up front.
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