What was Madhavrao's (Shama's) reaction to the incident with the two gentlemen from Goa, and what does this reveal about the scene?

In the account from Chapter 36, after two gentlemen from Goa visited Sai Baba, an unusual event occurred regarding their offerings. Baba accepted fifteen rupees from one but rejected an offering of thirty-five rupees from the other. Madhavrao, also known as Shama, was present and witnessed this. The text states that he was surprised by this 'partiality' and was prompted to question Sai Baba about it. This reaction highlights that Baba's actions were not easily understood by those around him, even his close devotees. It sets the stage for a potential teaching or explanation from Sai, as Shama's question seeks to understand the deeper meaning behind the seemingly arbitrary act.