Editor's note: Not sure about Southeast Asia.
Four Reasons McDonald's All-Day Breakfast Is A Headache for Franchisees - Breakfast sandwiches are cheaper than many of McDonald’s other burgers and chicken sandwiches, so by offering full-time breakfasts, McDonald's has essentially created a new lower-priced alternative to its lunch and dinner fare. In Chicago, for instance, an Egg McMuffin is $3.29, a Big Mac is $4.39, and a grilled chicken sandwich is $4.79. Hash browns also sell for 19¢ less than a small order of fries. If customers decide they want eggs for lunch instead of a burger, total sales figures will drop. "We are trading customers down from regular menu to lower-priced breakfast items," said a franchisee in the Nomura survey....
4 August 2015: Checking out breakfast at Mcdonalds in Singapore. The cheapest set option is SGD 3 (the lowest price set in Malaysia would be RM 4; SGD3=RM8.40 @2.80). Tea comes with (real) milk and Rainforest Alliance Lipton tea bag. Note they use a canola blend oil on sat (saturated) fats health concerns and par frying is done with sunflower blend. Thus, Nuggets get 30 pct less sat fats.