The line chart which is there in ppt is Stacked line chart which means one on top of another i.e. cumulative. You are supposed to make normal line chart not stacked one.
Right click on your chart in Powerpoint - Change chart type - Select first line chart
Once you do this, this would become normal.
Using this, I have changed your PPT charts and uploaded in the same folder which you have shared with me.
File name - earnings_VA.pptx