Oh, that is evil. That’s another like Attrayant’s spider question, where anyone in high school or above thinks, “I can do that in my sleep”, and gets tripped up because they were rolling their eyes too far.
But I think this question is invalid, because it asks “What is the total?” The total of what? The second sum? The first? Or both combined? It doesn’t say!
I see you have fallen prey to one of the classic blunders. The most famous of which is never get involved in a abortion war in GD. But only slightly less well known is this: Never go in against Rilchiam when mathematics is on the line. Ahahahahahahaha! Klunk
Sorry I didn’t get back to this sooner. Well, it’s just that 4090 + 10 does not equal 5000. Nor does 2030 + 2070 = 5000. They both equal 4100. That’s part of the trick.