CODE TO USE	WHAT TO DO
VL15	Buy 1 item get 15% off (except sales items)
3FOR2	Buy 2 items get 1 for free  (except sales items)
5FOR3	Buy 3 items get 2 for free (except sales items)
7FOR4	Buy 4 items get 3 for free (except sales items)
9FOR5	Buy 5 items get 4 for free (except sales items)