Hi guys, I am in need of a wee hand.

I have 2 columns, C & D.

C is a weekly column where an amount is placed for example 150.

D is the difference between each week. i.e C3 and C4 , C4 and C5 and so on.

Above these two colums is a merged cell of C & D giving me the sum of the
total loss of Column D

What the problem is that because next week for example has no data in Col C,
Col D gives me the difference between this week and next week of 150 instead
of 0 because there is no data for next week.

Can some one tell me how to overcome this wee snag?

Cheers in advance guys