Two prices, two units, one table. The mistake does not look like a mistake — it looks like a spectacular deal. Mixing per-1K and per-1M silently multiplies or divides by a thousand.
The rule
Convert every rate to the same unit before comparing. If a page says $0.003 / 1K and another says $3 / 1M, they are the same price. If you drop both numbers into a spreadsheet without converting, you invent a 1000× discount that never existed.
On Supesonic
Prefer reading rates as published in the live catalog and pricing, and keep the unit label next to every number in your own budget sheet.