A letter to your father requesting him to send you some money which you require for purchasing books. 

My Dear Father, 

I am quite well here, and hope all of you are also well there. 

These days I am working hard for the examinations which are near. My teachers also are working in the school. Today, my Physics teacher suggested a new book in the Class. He says the book is very useful. It costs one hundred ninety rupees only. Kindly send the amount of M.O., so that I may purchase the book. 

Convey my respects to mother, and love to younger brothers and sisters. 

With respects to you, I am. 

Yours affectionately, 
XYZ.