Quickly fill in blank cells (Excel equivalent)?

Question

I often import reports from Quicken into Numbers to create data tables for analysis purposes and find that I must fill in blank cells to ensure I have data consistency across rows.
While I am confident there is no built in way for Numbers to quickly populate these blank cells, I am asking here if AppleScript has the potential of providing the means. 
The following link gives insight into how it is done with Excel. Does the AppleScript library provide the tools for something similar?
http://www.techrepublic.com/blog/microsoft-office/quickly-fill-blank-cells-in-ex cel/
-DaverDee

Answer 1

Again SGIII, more than I expected.  Thank you.
A zero is treated like an empty cell.  It is overwritten with the previous non zero valued cell.
Lastly, so that I understand what you provided, I inserted comments for each line of code.  Would you please look over my comments to confirm that I get it?
My problem with learning AppleScript is that while I think I understand the code while reading it, I don't know the AppleScript vocabulary to create the code myself.
-DaverDee
Tells…
—From the selected range, in a table, on a sheet, in a document, within Numbers...
— Set the variable ‘pv’ to null.
set pv to ""
— Begin a loop starting from the initial cell in the selected range.
— Define ’c’ as value in the current cell.
repeat with c in cells
— Copy the value of the current cell to the variable ‘v’.
set v to c's value
— If the current cell value stored in the variable 'v' is not zero, then copy the value 'v' to the variable 'pv'.
if v is not 0 then set pv to v
— Otherwise, set the cell value defined by 'c' to be the value stored in 'pv'.
--Note: If nothing has been stored in 'pv', as in the case when 'v' is zero which occurs if zero or null is the first cell value in the selected range, then the cell is populated with a blank.
else set c's value to pv
—Close the If.
end if
—Close the repeat loop.
end repeat