How can I calculate amount of time left based on amount spent?

[Guest]

I need a way to calculate time left based on how much has been spent to date.
I have an original amount, and a period that the money has been set up to be
spent in, so I need a way to calculate how long we have to spend it based on
what was spent previously.

 

[Bob Phillips]

An example might help.

--
HTH

Bob Phillips

(remove xxx from email address if mailing direct)

 

[Pete_UK]

Assuming a linear rate of spending, you could obtain the percentage
spent so far (i.e. money spent divided by total amount), and then
multiply this by the overall period in which you have to spend the
money.

However, this makes a lot of assumptions. If you add the start date to
the overall period, then you will have the end date, and if you
subtract the function TODAY() from this it will give you the number of
days remaining (or however you format it).

Hope this helps.

Pete

 

[Guest]

Okay maybe this will help:
I have $500,000. I have six months time in which this money must be spent,
or lost. I got the funds 4/1. In April, I spent $120,000. I need the
formula to tell me how long I would have if I kept spending $120,000 a month.
I'll change the cell refrence on a monthly basis, that way if I spend
$135,000 in May, I will get a new calc. since obviously the funds would run
out more quickly. Hope that helps!