Who was the person that Sai Baba requested seventeen rupees in Dakshina from?

Sai Baba requested seventeen rupees in Dakshina exclusively from Kaka Mahajani. According to the account in Chapter 35, this happened during their second visit to the mosque in the afternoon, when Kaka requested Baba's permission for them to leave for Mumbai. Even on their first visit earlier that day, Baba had asked for Dakshina only from Kaka. The text emphasizes that Baba 'asked nothing of the friend, who then felt restless in his mind' because of this.