Chart Data Labels

Hi,

I have this stacked bar chart.
The top part shows the GM or profit (in dollars), the bottom part is the cost.

I would really like to have the top data labels show the GM in %.
And the bottom labels to show the total sales price instead of the cost.

Ideally I would also like the bottom data labels to be right at the bottom of each bar instead of the middle.


Is that possible?

Thanks.