Hi,
Are the checkboxes on a Userform or directly in an Excel spreadsheet?
If on an Excel spreadsheet, a checkbox will return either TRUE OR FALSE.
You can link your checkboxes to cells (1 per checkbox), either hiding the result column of the checkboxes or leaving it out in the open.
Then write an IF formula to gather the results. First checkbox linked to cell A1, for example.
=IF(A1=TRUE,50,0) Just replace the 50 with whatever the correct cost is.
Repeat this process for all checkboxes.
Ron