虽然目前的集中采购计划将进一步提高采购量，但是降价幅度却不确定，应根据项目成本进行权衡。
Although current plans for pooled procurement will further increase purchase volumes, savings are uncertain and should be balanced against programmatic costs.
建筑材料，是很常见的获得批量采购的折扣，所以购买的单位成本下降，从量的增加。
For construction materials, it is common to receive discounts for bulk purchases, so the unit purchase cost declines as quantity increases.
成本补贴因子对双方利润有较大影响，对采购价和年采购量影响较小，企业在制定合约时需考虑这些因素；
And it shows that the subsidy factor has a great impact on the their profits while has a little impact on the buyer's purchase price and annual purchase quantity.
成本补贴因子对双方利润有较大影响，对采购价和年采购量影响较小，企业在制定合约时需考虑这些因素；
And it shows that the subsidy factor has a great impact on the their profits while has a little impact on the buyer's purchase price and annual purchase quantity.
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