There are plenty of docs out there on how to use <cfheader> and CF's spreadsheet functions. I'm not gonna write your code for you. However if you write some code and have issues, and post back with a question, I'll keep an eye out for you.
CFHEADER:
http://help.adobe.com/en_US/ColdFusion/10.0/CFMLRef/WSc3ff6d0ea7785946 1172e0811cbec22c24-7aea.html
Spreadsheet functions
<cfspreadsheet>
http://help.adobe.com/en_US/ColdFusion/10.0/CFMLRef/WSc3ff6d0ea7785946 1172e0811cbec17cba-7f87.html
Google:
https://www.google.co.uk/search?q=cfspreadsheet
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Adam