Well, A soyburger a.k.a ("The Hugh") from McHugh's, complete with processed cheese-flavored food is listed at 2
The question is, what food item does this compare to in our McDonald's?
Basic cheeseburger? Quarter Pounder, perhaps? The name "The Hugh" would indicate it is a signature item, and from the other menu items provided, we can conclude that it is a single-patty hamburger. I will go with a comparison of a McDonald's signature item that is also a single-patty hamburger: The Quarter Pounder. (With cheese, of course).
"The Hugh" - 2
"Quarter Pounder" (w/cheese) - approx. $2
Also, we shall compare McHugh's Soysundae to the McDonald's Sundae.
Soysundae - 1
Sundae - $1
From this we can reasonably conclude that, in 2053 at least, the nuyen and the American dollar were approximately equal. Sorry, those are the latest figures I can dig up on futuristic fast food statistics.
-------End purchasing power parity calculation (of the McDonald's type)------
Nothing else.