How much $$$ does Sanibel actually earn from these book sales?

Love the curiosity. I wish more people questioned and understood how (little) artists get paid. The following is what I earn on different platforms:

• Paperback (direct from SRG Press): $8.32/copy

• Amazon - paperback: $5.47.copy

• Amazon - Kindle: $4.55/copy

• Amazon - Audible: ranges from $2.60-$4.70/copy depending on membership vs non-membership 

• Apple - ebook: $9.10/copy

• Apple - audiobook: $9.97/copy

• Barnes & Noble - ebook: $7.73

• Barnes & Noble - audiobook: $9.97/copy

• I removed it from Spotify because I only earned $0.25/hour (~$2.25 if you listen to the whole book)​