Notice prices of the Hotcakes sets (circled in blue), S$5.90 for Hotcakes with Sausage and S$5.65 for Hotcakes without sausage. From here you can derive the piece of sausage should be priced at S$0.25.
Now look at the price difference between the Sausage McMuffin with Egg Meal and the Mega Sausage McMuffin with Egg Meal. The price difference is S$1 for that same additional piece of sausage. That’s paying 3 times more.
So next time you think the mega burgers are a great idea, well, it certainly is, especially at ripping people off.