Ang pamasahe sad yip sa layong apat na kilometro ay ₱2.50 at may dagdag na €50 sa bawat kilometro. Magkano ang pamasahe mula Pasig hanggang Antipolo kung ang layo nito ay 16 kilometro? ​

I'm probably answering this incorrectly but I'll try.

2.50(4) = 10

50(16) = 800

10 + 800 = 810

The extra is confusing me. Does it come from the very beginning of the trip or does it only count after the first 4 kilometers?

what level of math? also i don't need to be paid if i can you.