Data Entry

I have one and a half books (270 pages total) of handwritten ledgers. I need the data from the ledgers transferred to a Google spreadsheet. When I do the data entry myself, it takes me 4 minutes per page.

The ledger contains yoga class attendance data: date, class name, teacher name, student name, amount paid. Usually there are between 10 and 25 records of this type per page.

I require complete accuracy in transcribing the data. If there are mistakes in the ledger, I want the same mistake replicated in the spreadsheet.