I can’t determine the design cost from the project itself—billing, engineering hours, contractor fees, and Flux AI usage costs aren’t stored in the schematic or PCB data.

If you mean manufacturing/BOM cost rather than engineering design cost, I can help estimate it from the 29 components, PCB specifications, quantity, and assembly vendor.

The image confirms this is a moderately simple custom evaluation board: 29 components, USB‑C, dual-UART bridge, regulators/protection, XM125 module, and debug headers.

A reasonable professional engineering estimate is $4,000–$12,000, roughly 40–80 hours covering schematic, PCB layout, reviews, and manufacturing preparation. That excludes prototypes, firmware, testing, enclosure work, and the XM125/module BOM cost. The exact historical cost cannot be recovered from the board files or screenshot alone.