Data Entry

We need regular data entry work done. We will provide scanned pdf copies of surveys which have been completed by hand. Each project will have a web based link to use for plugging in the data from the pdf copies. On average, a data entry person can complete 250 - 300 surveys per day. Currently we expect to have at least 3 days of work every month but this can rise at times up to 10 days of work in a month in a peak period. We expect the demand to grow over time and would like to have a few freelancers available to do the work when it's required. Please give me a day rate for this very basic type of work.