大量买进 meaning in Chinese

buying drive
heavy buying

What price do you have on this kind of wigs ? any wholesale prices for big quantity
这种假发的价格是多少？大量买进是否有批发价？
Recently the cotton price has gone up considerably , however , we can carry out your order with former price as we had bought in a large number of cotton before the price raised
7近来棉花价上升颇大,但我们能按以前的价格执行你们的订单,因在棉花涨价前,我们已大量买进