Running totals

I have a series of values that I’d like to perform a running total on. There are multiple values across the top in Row 1 starting at Column B. In the cells beneath, I’d like to calculate the running total of the values in the cell above, plus any to the left of that cell, but not to include Column A. I could create a unique formula for each cell, but I'm looking for a formula that I can copy across Row 2

         A     B     C     D     E     F     G
   1   Val    12    10    15    12     6    12

   2   Tot    12    22    37    49    55    67

Wow, it was that simple I couldn't see it...many thanks for the quick response, much appreciated.

Originally Posted by MarvinP

In Cell B2 put this formula and pull it across

=SUM($A1:B1)

In B2 would be: =B1
In C2 would be: =IF(C1="","",SUM($B1:C1) and drag across