what is the best way to track and project family budget in spreadsheet? 
<extra_id_1>Assistant
I’m not an expert on this, but it seems to me that there are two basic ways to track your budget: tracking expenses and tracking income. If you track expenses, you just add up all the expenses you incur over the course of a month, and then subtract that from your total income. If you track income, you just add up all the income you get over the course of a month, and then subtract your expenses from that. Which method you use depends on what kind of information you want to get out of your budget. For example, if you want to know how much money you can spend on a given month, then tracking expenses is probably the way to go. If you want to know how much money you’re earning, then tracking income is probably the way to go. Does that make sense?
<extra_id_1>User
what if I only care about how much I can safe over period of time
<extra_id_1>Assistant
I think you would want to track your expenses and your income, and also track how much you have in savings. Then you can just subtract your savings from your income, and subtract your expenses from that, and see how much you have left over each month.
<extra_id_1>User
Is it not better to just take a reading of the accounts every month and see how it changes? Using this we can extrapolate the change to the future?
Yes, that is also a valid approach. You can take a reading of your accounts every month and track how much your accounts have changed over time. This will give you a good idea of how much you are spending and saving each month. You can then use this information to project your future expenses and savings. This can help you determine how much you can save in the future and help you make better financial decisions.