Follow the tape and read the following text aloud until you are familiar with it,Then record the text you read. 提示:跟读课文录音带,完成下面课文内容的朗读,读熟后完成录音提交。 P7 Bill of quantities . Each unit price includes both direct costs and indirect costs. Direct costs refer to the cost of materials, labor and machinery, while the indirect costs include office fees, camp costs, transportation expenses for workers, insurance.