Can you recount the story of the two gentlemen from Goa mentioned in the Satcharitra?

Chapter 36 of the Shri Sai Satcharitra introduces a curious incident involving two gentlemen from Goa who came for Sai Baba's darshan. Both men surrendered at Sai's feet, filled with joy. However, Baba's interaction with them was puzzling. He specifically asked for fifteen rupees in Dakshina (a monetary offering) from only one of the men, which was given joyfully. When the second gentleman, unprompted, tried to offer thirty-five rupees on his own accord, Sai Baba immediately rejected the offering. As Chapter 36 notes, this apparent partiality surprised everyone present, including Madhavrao (Shama), who proceeded to question Baba about it.