This site lists this specific six-bottle figure directly: $49/bottle, total $1,074 struck through to $294, free US shipping.
6 Bottles at $49/bottle, a 180-day supply, with free US shipping and the lowest per-bottle cost among the three tiers, per this site's own pricing breakdown.
This site directly recommends this package for "enough supply for a full three-month trial" — worth noting a 180-day supply actually exceeds the two-to-three-month window this site elsewhere states as the realistic evaluation period.