My spread sheet has slowed down considerably, and I've notice on the
very bottom bar of my excel sheet it now shows

Circular:G4

What does this mean?
And could one thing have anything to do with the other?

My formula in G:4 is as follows:

=IF(B40,IF(SUMIF(P_Invoice!B4:B10002,P_Cheques!C4 ,P_Invoice!F4:F10002)=P_Cheques!D4,"Pd","UnPd"),0)

Thanks for your help.

Wally