Well, seven of them beat your init, so they take their hits before they all go to their bright future. Well, bright and warm.

Given that they need a crit to do more than minimum damage, I wont bother rolling damage unless they get 20s.

Bites:
(1d20+4)[8]
(1d20+4)[22]
(1d20+4)[13]
(1d20+4)[20]
(1d20+4)[13]
(1d20+4)[5]
(1d20+4)[19]

Then, they all die, granting you 300 xp.

Then, looting the room, you get 90 GP, and find an old masterpiece painting in decent condition(estimated worth 1400 GP).