Because we co-authored the book we each got 5% of revenue for physical books and 12.5% for ebooks and digital access (10% and 25% for individual authors).
So far I have received $539 over 5 months.
On average, the book has sold 222 copies per month which is greatly skewed by the first month which had 930 sales. The last month (March) had 34 physical book sales. I suspect that number will go down even more over the next few months.