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.
On site
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.