=AND(OR($C100,$D100,$L$70),$C10<1000*Gr6or8,$D1 0<1000*Gr6or8)

The above formula is used validate checkpoints of a given route.

Cell $C10 is the first 3 didgits of the six digit Grid Reference
Cell $D10 is the second set of 3 digits
Cell $L$7 is the Start elevation

Is there any other way to write this and simplify it, when I type it in
my spreedsheet I get this #NAME?

Could you help please.

I did not write the formula merely trying to understand it.


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Stphn
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