MS Excel - Google Docs - Using possible if statements?

Question

I have clients that spend money on a daily basis. I need to be able to keep their average daily spend as close to their budget as possible. I want to be able to add a function/formula that will add up their daily spend, subtract from their monthly budget, then divide the leftover money based on the number of days left in the month

Answer 1

If you have a column of dates listed in column A for example, and the spending per day listed in column B, and the monthly budget in a cell, say D1, for example during the month of March then you could set up this formula in another cell to determine the target spending per day in the future:

Remaining budget would be

= D1 - SUM(B1:B31)

Remaininng days in the month would be

= A31-TODAY() 

So then the answer would be

=(D1 - SUM(B1:B31))/(A31-TODAY())