Washington (AP) - Shoppers who enjoyed a sustained drop in clothing prices over the past year are likely to see markups on pants, shirts and dresses if the Bush administration gets China to agree to comprehensive limits on its clothing and textile exports.Since a three-decade system of clothing and textile quotas expired Jan. 1, there has been a flood of clothing and textile imports entering the United States from China.Washington (AP) - Shoppers who enjoyed a sustaine