Rough bill of materials is probably around 3-5 dollars (I searched online and found low power wifi chips in bulk at around 2-3 dollars). I'd estimate 10-15 doll

Rough bill of materials is probably around 3-5 dollars (I searched online and found low power wifi chips in bulk at around 2-3 dollars). I'd estimate 10-15 dollars after R&D, assembly, packaging, shipping, etc. Does that seem reasonable?