I ma quite new to using Excel and am trying to make up a sheet to add up sales. The error I am getting in the sheet is when I try to subtract one cell from another, where the result should be I just get the error code #VALUE! the Formula I have put is "=sum(A5-A4)"
I have tried various different things but just can't seem to work it out?
Until recently our projector at work was used with a laptop so that you could see images both on the laptop screen and also on the projector screen. Now that we using a tower instead and the projector is using the VGA slot we are no longer able to view an image on the PC monitor. The PC uses onboard graphics.