Dear Mr. 1830 Census Enumerator:
You obviously need this wonderful invention that we have invented since you first enumerated the persons in your area to calculate your totals. It is called a spreadsheet program. You can choose from several. There is Microsoft Excel, Corel Quattro Pro, Open Office Calc, Lotus 1-2-3, and even Google Docs. If you put in the correct formula, it is very easy to calculate the totals so that you are not off by 5 persons!
Someone in the 21st century who is using your data