Renamed because resource cost is not supported in GanttProject in any form, and 
units mean a fraction of time devoted to some task. "Cost rather than time" 
thus doesn't make too much sense.

[deleted comment]

you guys can do whatever you want, I have given up hope for this project being 
useful.  if I need project management, I know one place to go: Microsoft 
Project. it works and it works well, though it is expensive.

Please this wold be nice. 
this is related to issue 142.

I agree. It would make the program much more useful if one can do cost estimate 
based on each resource's assigned work hours and flat charging rate.

I think the program is working very nicely and does a lot of stuff that puts 
microsoft project aside. The ability to do cost estimation as a built in 
function would upgrade the application very much.

I love this product and I use it! 
But....
Cost Estimation,obtained simply multiplying hours of devoted time to a task by 
a fixed hourly fee set for each resource.
This would really be a big leap forward.

Cost estimation would be a great enhancement to an already very useful tool.
In addition if the cost could split into categories that would be the icing on 
the cake.

This would be the best if costings could be integrated. I would be using this 
as my main program if it could.

Yes, this would be very helpful.
If in the meantime, I could recommend:
one could set for a task/resource combination a value and an amount of how this 
person for this task will be paid (example month 1.000 usd) and then export to 
csv a report with this info then the rest of calculations can be done in Excel. 
This could be a "simple" way of helping the users (me one of them) have a head 
start on the costing part.

Thanks for the application and your efforts.

Beta builds of GP 2.7 provide simple task cost calculation with per-day 
resource rates.

Closing all tickets with status "FeelFreeToTest". Feel free to reopen if the 
issue is still reproducible.