Clicking the first graph icon 
loads the cost chart for the current year
Clicking the world icon 
exports the chart to html and opens it in your web browser
The second bar icon 
loads a chart for the current item cost
Use the folder icon 
to load a saved chart
The disk icon 
saves the current year chart to the year folder
The print icon 
prints the chart or loads it to print preview for a view of the full chart.