March 31 (Reuters) - Canadian discount store chain Dollarama Inc reported a 3.6% rise in quarterly sales on Wednesday, as customers spent more on groceries and other household essentials during the COVID-19 pandemic. Net sales rose to C$1.1 billion ($872.95 million) in the fourth quarter ended Jan. 31, from C$1.07 billion a year earlier. ($1 = 1.2601 Canadian dollars) (Reporting by Mehr Bedi in Bengaluru; Editing by Ramakrishnan M.)