What was the surprising message Sai Baba sent to Madhavrao, and what was Madhavrao's unique response to the request for Dakshina?

In an interesting event detailed in Chapter 18, Sai Baba sent a messenger to Madhavrao Deshpande, also known as Shama, with a specific and sudden instruction. The message was that Shama should give fifteen rupees as Dakshina. The messenger explained that Baba had remembered Shama and dispatched him to collect the money and also to spend a few moments talking with him. Hearing this, Madhavrao was "extremely surprised." Instead of giving the fifteen rupees in cash, he provided a different kind of offering. He told the messenger to convey his "namaskar" (respectful greetings) to Baba as his form of Dakshina, to which the messenger playfully replied that fifteen namaskars had been received.