Option Left: $0.85 and 190 mg of caffeine. 5 calories, 15 mg sodium. Tastes like crap (flavor nonspecific).
Option Right: $2.80 (2 x $1.40, bought by the case at Costco) and 240 mg total caffeine. 20 total calories, 90 total mg sodium. Tastes great (if you like the flavor).