Data validation

[Mornecr]

i want to add up cells in validation (H13:H15) and use a max total of 100 for all the cells in (H13:H15), but if i add totals in cell H13(40), H14(30) and H15(50) it must not allow it. The total of all the cells (H13:H15)if you add up must not exceed the number 100.

 

[Hui]

Try

=SUM($H$13:$H$15)<=100