although it will be a continual process of fine-tuning the inventory to determine just what merchandise bay area shoppers prefer , kahn predicts that it will take about a year for the vallejo store to have made all of its major inventory adjustments , to have some assurance that there 's no demand in this relatively dry climate for brass outdoor lamps that are designed not to tarnish in moisture , or that california stores can sell $ 6 dirt dude bike team t-shirts as quickly as they land on the rack .