I need to update a spreadsheet that uses macros for invoice tracking. Here
is an example of what I am calculating:

Invoice 1 Task 1 Task 2 Task 3 Task 4
Company A $500 $1,250 $400 $375
Company B $220 $0 $546 $2,877

Invoice 2 Task 1 Task 2 Task 3 Task 4
Company A $300 $1,250 $400 $375
Company B $220 $0 $546 $2,877

Totals
Company A $700 $2,500 $800 $750
Cumulative Total
Company B $440 $0 $1,092 $5,754
Cumulative Total

I need to add a column (Task 5 etc.) and have that be included in the macro
for calculating ALL of Company A for each separate task, same for Company B.
The person who created this spreadsheet is no longer with us and I do not
have experience using Macros in Excel in order to add this column and other
future columns.

Thanks. -Christina