Calculate your earnings on each sale of book. It is so simple to calculate just put number of pages, book size and other details including MRP and just calculate.
Royalty = (MRP - 18% GST) - (Handling charges + Production cost)
On seller site
Royalty = (MRP - 18% GST) - (Handling charges + Seller site commision + Production cost)
Note : Include 18% GST in your MRP.