What specific sacrifice did Cholkar make when he was unable to immediately fulfill his vow to Sai Baba?

Cholkar's vow was to distribute sugar candy in Sai Baba's name after passing a crucial examination. According to Chapter 15, after his wish was granted, he faced financial hardships that prevented him from traveling to Shirdi to fulfill his promise. This delay weighed on him. To maintain the sanctity of his vow and as a personal act of devotion, Cholkar made a significant sacrifice: he completely gave up eating sugar. The text explicitly states that until his vow to Shirdi was fulfilled, Cholkar avoided sugar as an inedible substance and even drank his tea without it. This personal penance, undertaken in secret, demonstrated his firm resolve and devotion, a fact that Sai Baba would later miraculously acknowledge.