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McDonald’s All-Day Egg McMuffins Seen Boosting Sales 2.5%

A McDonald's Egg McMuffin.

A McDonald's Egg McMuffin.

Photographer: Justin Sullivan/Getty Images

McDonald’s Corp. may get a significant boost if it lets customers buy Egg McMuffins beyond breakfast hours.

Selling the muffin-based sandwiches all day may help increase the restaurant chain’s sales by as much as 2.5 percent a year, according to notes from an August presentation that Mike Andres, McDonald's president for the U.S., made to franchisees. The change also would lift guest counts as much as 2.3 percent and help each restaurant generate $31,000 more in profit, the notes say.