Adding the correct number of working days to the chart, skipping off days

Hello.

I understand that according to implicit rules of these wonderful forum it is better to add description of the task into the body of the thread, but in this case I can only explain what I would like to achieve by attaching the file. Sorry about that.

I would like to create a (stacked bar) chart that takes shows the length of each task, starting at the start date and finishing at the exact finish date, skipping all off days.

I have three small tables: Plan, Actual, and the table with data for the chart.

Both the Plan and Actual tables correctly compute the actual finish date based on the number of actual working days, skipping all off-days, which are listed in a separate tab of the workbook.
But in the third table, which is used for the chart also, I have the starting date and the number of working days. If I use these data points, I do get a nice chart (I want it in exactly this format of a stacked bar chart) but all finish dates are incorrect, of course, because they are computed by simply adding my defined working days to the start date.

Please, help me to figure out how to make my chart finish each each bar on the correct finish date; how I shall change my plot series, or add some formula so it knows not only the correct start date but also the correct finish date?

Thank you very much for your help!