Batch Convert xls to pdf

Hi Everyone

I really hope someone can help with this. I have approximately 1700 excel workbooks. Each workbook has a chart in one of the worksheets. I need to make a pdf of each chart (only the chart) and have the pdf file saved with a unique file name (numbers). I was thinking I could do this using a perl script but I need some direction/advice.

Thanks for any help you can provide.

Chris