Iteratively vary dispersed cells in a global way?

Question

hi all.
i have a spreadsheet where i am totaling cells in sections that are laid out vertically so that the totals show at the bottom and then i start another section and i total that section etc. i am also totaling the rows horizontally so that i can see the horizontal totals.
some of these cells - for instance in a ROW - have a percentage markup of 10% or something.
is there a way to CHANGE this markup product - for instance =PRODUCT(A1:C1,1.10) so that they markup is 1.15 or fifteen percent instead of ten? right now i am copying and multiple select pasting this equation into the cells in the sections and i am worried that if i try to change the whole row by assigning this equation to the ROW that i will also screw up the totals in the sections because they will /also/ have this markup applied to them when they are SUMS.
anyone know how to do this?
TIA

Answer 1

HW,
This type of thing usually begs for another table where "global" setup stuff goes.:
In this example the table on the left contains the column (B) that needs to be marked up AND the resulting marked up column (C).
the table on the right (name "Setup") contains a cell with the value for the mark up.
In the table on the left (Table 1):
C2=B2×Setup::$B$2
select C2 and copy, then select the column, paste
the "$" in the cell reference means to make the reference absolute-- this prevents Numbers from adjusting the cell reference when filling.  As a result the cell B2 is multiplied by the value in the table "Setup" cell B2.  when you fille the formula down in the table on the left the cell references will adjust but the absolute reference will not:
so...
C2=B2×Setup::$B$2
C3=B3×Setup::$B$2
C4=B4×Setup::$B$2
C100=B100×Setup::$B$2
etc
now you can change the value in the setup table and affect ALL entries in the markup column