I have a budgeting spreadsheet on Google Sheets which I’d like to be able to do two things (the first, I think, is easier than the second and the first is the priority for me):
I write a value in, say, cell A1 of income I am expecting from a certain source that month. When all or some of that income hits my bank account, I’d like to be able to write that amount in, say, cell A2 and have it automatically subtract from what’s in A1. So say I’m expecting to earn £1000 from a certain client, I record £1000 in A1. Then I’m paid £600 (with the rest to follow later). I’d like to be able to write £600 in A2 and A1 automatically update to £400.
If poss I’d also like to be able to make cells A1 and A2 sum any subsequent figures I put in there and still subtract A2 from A1. So, for example, I’d like to be able to add figures over time into cell A1 and have those figures sum up. Then I’d like to be able to do the same to cell A2 and for those figures to sum up too, and then subtract from what’s in A1
So imagine I had £1000 in A1 and then I do some more work for that client and so am expecting a further £500. So I then overtype on the £1000 in A1 with “500” and the cell returns a value of £1500. Then I get paid £600 for one bit of work from the client, write £600 in A2 and A1 automatically returns a value of £900 (per the process in point 1 above). Then I earn another £400 from the client, overtype on £600 in A2 and so that cell returns a value of £1000, and A1 automatically updates with a value of £500.