Oct 25 (Reuters) - Australia's Woolworths Group reported a 5.3% jump in first-quarter group sales on Wednesday, helped by resilient demand and moderating inflation in its food businesses.

The country's top grocer logged total group sales of A$17.22 billion ($10.94 billion) for the three months ended Sept. 30, compared with A$16.36 billion a year ago, and a Jefferies estimate of A$17.21 billion. ($1 = 1.5736 Australian dollars) (Reporting by Roushni Nair and Echha Jain in Bengaluru; Editing by Shailesh Kuber)