Ulta Beauty (NASDAQ: ULTA) just wrapped up a fiscal year that included strong sales growth a another big step toward management's long-term goal of building a 1,700-store base. The retailer's fourth-quarter report contained signs of profitability struggles, though, due to price-based competition in the makeup industry.CEO Mary Dillon held a conference call with Wall Street analysts to put those market share challenges in perspective and explain why management isn't worried about another profit margin drop in 2018.