Enforcer 20-Ounce Flea Killer for Carpet, Ocean Breeze Fragrance

Does this work on bare floors as well? My house is mostly bare floors with a few area rugs.

Does this product kill the flea egg and larva? It show the picture, but doesn't say it kills egg and larva...

Do you have evacuate your home for the several days you use this product? Can you still continue letting your animals walk on it?

If I buy two bottles of this item, is there combined shipping discount?