NEW YORK--(BUSINESS WIRE)--Shake Shack Inc. (“Shake Shack” or the “Company”) (NYSE:SHAK), today reported financial results for the first quarter ended April 1, 2015, a period that included 13 weeks. Financial Highlights for the First Quarter 2015: Total revenue increased 56.3% to $37.8 million. Shack sales increased 59.2% to $36.0 million. Same-Shack sales increased 11.7%. Shack-level operating profit*, a non-GAAP measure, increased 78.3% to $9.3 million. Adjusted EBITDA*, a non-GAAP measure, i