Does enlightenment stack?

Does the monk buff enlightenment stack with other experience buffs? For example say you've got the rested bonus and an heirloom that gives 10% more experience gained, would this add up to 260% experience gained? Or if you have the rested bonus would the 50% be calculated as 50% of 200, making the total 300%? Or does enlightenment just not stack with rested/heirlooms at all?

Science! 61 dwarf monk vs 61 marshfang ripper

(10% guild perk, rested)
540 * 2.2 = 1188 xp ... (base + 10%) * 2
(10% guild perk, rested, 15% items)
540 * 2.5 = 1350 xp ... (base + 25%) * 2

(10% guild perk, rested, enlightened)
540 * 3.2 = 1728 xp ... (base + 60%) * 2
(10% guild perk, rested, enlightened, 15% items)
540 * 3.5 = 1890 xp ... (base + 75%) * 2

Everything stacks additively, except rested - which doubles everything.