TORONTO — In its first quarter, Canadian Tire Corp. reported a 3% drop in profits owing to higher taxes and poorer performance in the company’s financial services business, plus lower gasoline prices. However, retail sales were up 4.5% overall for the Canadian Tire Retail division. The company also enjoyed a rise in same-store sales for each of its principal banners: 4.7% at Canadian Tire, 8.6% at FGL Sports, and 5.5% at Mark’s…