DATA ENTRY

I need information from several files compiled into one excel spreadsheet, verified for accuracy, missing information added and info organized alphabetically. The data includes business names, locations, categories, websites, email addresses, phone numbers, etc. The spreadsheet is already about 50% complete. I need the information already on the spreadsheet to be checked for accuracy. I need the remaining information in the files to be added to the spreadsheet. Any information not in the files can be obtained from the listed website and put on the spreadsheet.