Survey Data Entry

I am bidding on a project, and I need to determine approximate costs for data entry for 3 mail surveys. For each survey, there will be approximately 20 questions. I will scan each completed questionnaire and email the scans to you in batches. The surveys will be pre-coded. That is, for each answer option, there will be a pre-code, like “Very Satisfied=5”, “Satisfied=4”, etc. I need someone to enter the data into an excel spreadsheet. In total, I anticipate about 1800 responses.