Hi there, 

Whenever you pick up on these sort of inconsistencies, feel free to write to PrepLounge so they can ask the author to withdraw it or adjust the case. 

It's good that you have an eye for detail ;)

Best,
Cristian

Question 1:

It's a matter of thinking about beggining of the year vs. end of the year (in one you have 120, on the other you have 120+72).

The problem is that on the first graph it has one year before “Year 1” and is stated as “Initial” and has… 196 bottles. Well, if it is the initial… it could only be 120, so yes, the graph is mistaken.

But… by the end of that year, it would have sold 120 + 72

Question 2

No bottle is more that 5 years old, as after 5 years they are sold. So max value is “Initial Price” * (1+20%)^5 * Number of Bottles

(edited)