刚看到这个，怎样下才行呀*Quantities are limited and all offers are subject to availability while supplies last. Your free foundation primer (a $30 value) will automatically be added to your cart at the time of purchase. Only one free full size primer may be applied to each order. Offers cannot be applied to previously placed orders. Laura Mercier reserves the right to cancel any order due to unauthorized, altered or ineligible use of offer and to modify or cancel any promotion due to system error or unforeseen problems.