need to substitute formula result from #### to"CHECK YOUR ENTRY"

[Guest]

I have a results cell that adds total time worked minus meal time.
excel displays negative time as ####.
How can I amend the formula to change #### to show "CHECK YOUR ENTRY"

 

[Guest]

perhaps:
=IF(total time > meal time, total time - meal time, "CHECK YOUR ENTRY")

 

[David Biddulph]

=IF(A2-B2<0,"CHECK YOUR ENTRY",A2-B2)