Can you summarize Cholkar's experience, from his vow for the exam to Baba's final confirmation?

Cholkar's journey, as narrated in Chapter 15, begins with his desperation to pass an exam to secure his job. He made a firm resolve, vowing to Sai Baba that he would distribute sugar candy upon passing. By Baba's grace his wish was granted, but financial hardships, called the 'threshold-ghat', delayed his pilgrimage to Shirdi. During this period, Cholkar demonstrated his devotion by giving up sugar completely. When he finally gathered the means to go to Shirdi, he fulfilled his vow with a joyful heart. The story culminates when Baba, knowing Cholkar's secret sacrifice, instructs that he be given tea "well-filled with sugar," confirming to the devotee that Baba knew every detail of his vow, his delay, and his personal penance.