Spreading a total value in a chart into the future

[#1]

Please could someone help me in spreading a total value in a bar chart

Currently on my bar chart I have a column each month for

1. project sales

2. outbase sales

3 cap report values

I want to create a new expression which will sum a field called OSvalue and spread this on the chart over the next 24 months form today!!

Greatly appreciate any help.

[MK_QSL]

Provide sample data please!