What is the story behind the seventeen rupees of Dakshina mentioned in the Sai Satcharita, and who was involved?

The story of the seventeen rupees of Dakshina is detailed in Chapter 35 and involves Kaka Mahajani and his skeptical friend. Upon arriving in Shirdi, Kaka gave Dakshina when asked, but his friend was not. Later, before they were to leave for Mumbai, Baba again requested Dakshina, but only from Kaka, this time asking specifically for seventeen rupees. The friend, who had initially resolved not to give anything, felt restless and excluded. He questioned why he wasn't asked, and Baba revealed it was because he had no initial intent to give. However, moved by Baba's omniscience, the friend's heart changed. When Baba told him, "if you wish to give in your heart, then give," the friend, in his eagerness, voluntarily completed the payment of seventeen rupees at Baba's feet.