What is the primary purpose of the invocations at the beginning of Shri Sai Satcharitra, as explained in the first chapter?

The first chapter of Shri Sai Satcharitra, titled Mangalacharan, explains that auspicious invocations are performed at the start of any task for its obstacle-free completion and to obtain divine grace. As stated in Chapter 1, the reason for this auspicious beginning is the removal of all obstacles, and the purpose is the fulfillment of the desired goal. The author offers salutations to Ganapati, Saraswati, the Guru, the family deity, and Sadguru Sainath to ensure the successful writing of the book and the attainment of auspiciousness.