A purchase order buys parts and repairs against a plant item, so its money is
running cost and belongs in the same per-machine, per-month series the Overview
already reads. Without it September showed nothing at all.
Merged at READ time, never copied into monthly_running_costs: that collection is
deleted and rebuilt by every seed, so a purchase written there would vanish on the
next one and have to be re-uploaded. purchase_lines is never deleted, so the money
lives in one place and the Overview adds it up.
- Month comes from the PO date (when it was ordered), not "Required By":
MEGPPO50532 is dated 07/10 but required 29/08 and those must not be confused.
- Only lines allocated to a machine are counted. An unallocated line is real money
not yet on a plant item; it stays on /purchases, reported, rather than being
hidden or added to the fleet total.
- A PO with no readable date is excluded and named, never guessed into January.
- Bottom total row shows incl ABOVE excl per month and for the YTD. Workbook
figures carry no VAT column, so RUNNING_VAT_PCT (15, confirmed by every PO line)
is the single constant to revisit if they are ever restated ex-VAT.
September now reads R 5 842 incl / R 5 080 excl from the two September POs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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