u/Legitimate-Career342

This is work for calculating elasticity, super easy basic math, and I completely understand how to do it. However, I am extremely confused by the layout my teacher put it in. The numbers for the original price and the new price are given, but unlike other homework, the original and new quantity is not bluntly listed. He helped me with that problem earlier but it was very fast, I have zero clue and my midterm is tomorrow. could someone explain in detail where the quantity values of 12 and 53 come from?? From the table that was given.

Glad my teeth are straight and clean tho :)