Can you walk me through the story of Cholkar and his vow to Sai Baba?

A devotee named Cholkar made a vow to Sai Baba, promising to abstain from sugar until he could visit Shirdi. He faced significant financial struggles, described in Chapter 15 as a "threshold-ghat" (home expenses) that was very difficult to cross, which delayed his pilgrimage. During this period of waiting, he diligently kept his vow, even drinking his tea without sugar. When he finally gathered the means to go to Shirdi, he fulfilled his vow by prostrating at Baba's feet, offering a coconut, and distributing sugar. The story culminates in a moment that confirms his faith, as detailed later in the chapter.