求翻译：该中标服务费以中标金额为基数，按计价格[2002]1980号文附件《招标代理服务收费管理暂行办法》规定的差额定率累进法计算是什么意思？

The winning bid amount of service charges to the base, according to the total price [2002] No. 1980 Annex "Interim Measures tender agent fees," the difference between the fixed rate under the progressive method

In the standard service charge to the winning bid amount as the base, by taking into account price [ 2002] No. 1980, annex on the bidding Agent service charges under the Provisional Rules on the management of progressive law fixed rate calculated difference

Should be selected the service fee take to be selected the amount as the cardinal number, according to counts the price [2002]1980 number article appendix "Tender Proxy To serve the differential fixed rate progressive increase law computation which Charge Management Tentative method" stipulated

The winning service fee to the bid amount as the base, according to price [annex the tendering agency service fees, 2002]1980 difference between the provisions of the interim measures for the administration of the fixed-rate progressive method

The winning service fee to the bid amount as the base, according to price [annex the tendering agency service fees, 2002]1980 difference between the provisions of the interim measures for the administration of the fixed-rate progressive method