canadian dollar store retail chain dollarama inc said that it intends to renew its buyback program to repurchase up to 75 of its public float over the course of a oneyear period dollarama said tuesday it received approval from the toronto stock exchange to renew its normal course issuer bid or ncib to buy back up to 187 million of its shares starting july 7 at mondays closing price of 7549 canadian dollars us5870 the value of the shares would be around c141 billion