What is the summary of the financial expert?

What is the summary of the financial expert?
Margayya has a flair for minor financial transactions which are an integral part of Indian life. We first meet him sitting in the shade of a banyan tree, advising the people of Malgudi how to extract loans from the Co-operative Bank. A brush with the secretary of the bank, and an accident in which his spoilt son Balu throws his account book down a drain, cut short his career as a financier.Then his fairy Godmother comes in the form of Dr. Pal who gives him a manuscript of the book 'Bed Life' concerning marriage and sex. This on publication becomes an instant success and with the money Margayya starts a money lending business which makes him rich.But Balu again proves a nuisance. He doesn't pass his matriculation and once he even runs away to Mysore. So as all the parents do, he fixes Balu's marriage with Brinda to make him straight-headed. After the birth of his child, he demands his share; Margayya finds Dr. Pal working behind all this, and in anger beats him with his sandal. Now Pal is pissed off and he works against him. As a result of the rumours Margayya's depositors demand their money back, which makes him poor overnight.His family home is saved with the help of his brother. Margayya asks his son to sit under the banyan tree and start his former business but Balu is too dignified to do such a thing. So Margayya himself goes to his profession with the determination to continue it until his death.