This was fun, and more difficult that I first anticipated.
I too had to spend some time om the parsing, but i the end I came pretty close.
I did not match the result provided, but I can see, that others has questioned whether Atmoic Fireballs is the same as Atomic Fireball.
Since the bag only mentions Fireballs, I assumed they where the same, but oddly enough, it I remove the calorie count for the "Atmoic" Fireballs, then my calorie of the bag is equivalent with the provided solution.
Until next week...