ABC公司生产甲产品需要用一种材料，年需要量为3000千克，该种材料的采购价为 20元/千克，每次订货成本为150元，每千克材料的年储存成本为10元。回答下列问题(计算结果保留整数)： (1) 若符合经济进货批量基本模型的使用条件，计算经济订货批量及最低相关总成本； (2) 若允许缺货，且单位缺货成本为5元，计算经济订货批量及平均缺货量； (3) 结合(1)的计算结果，如果供应商提出折扣条件：一次订货量在800千克以上的可获1%的折扣，在1500千克以上可获2%的折扣，计算经济订货批量。

A. She works in a law office.
B. She works for an answering service.
C. She works at an employment agency.
D. She is a teacher.

A. Millions of Americans began to doubt the efficiency of telecommunications.
B. Millions of Americans sued(起诉)the telecommunications company.
C. Millions of Americans were frightened by the accident and became silent.
D. Millions of Americans bad to live and work without the technology they depend on every day.