A company is preparing for a major product launch and needs to develop a comprehensive communication strategy that aligns with its sales goals. The marketing team has proposed three different communication channels: social media, email marketing, and direct sales outreach. Each channel has a different cost structure and expected reach. Social media campaigns are estimated to cost $5,000 and reach 50,000 potential customers, email marketing will cost $3,000 with a reach of 30,000 customers, and direct sales outreach will cost $10,000 but is expected to reach only 15,000 customers. If the company has a budget of $15,000, which combination of channels should they choose to maximize their reach while staying within budget?