英语翻译

英语翻译
A contractor in preparing his tender is required to enter a unit rate or a price against each item.The bill of quantities is often prepared for work that has been only partly designed and detailed,and for which all the detailed drawings are not yet available.Hence the quantities in the bill are approximate.Similarly,a schedule of rates is a list of categories of work believed to be required in the works (but with no quantities given) against which the tenderer is expected to write in the rate required for carrying out one unit of measurement of the item.An alternative method to the tenderer quoting a rate is for the consultant who prepares the schedule of rates to insert suitable rates and to require the tenderer to quote a percentage by which the tenderer wishes to raise or lower them if awarded the contract.