Excel Practice 5
You can check it also via Google Docs https://docs.google.com/spreadsheet/ccc?key=0AgBaME46uhAQdEJzTTE2Q2h3OGQ2NG9veUNZLTRETEE#gid=0
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Excel Practice 3
sorry for some mistakes. I do it with my own hands , according to the instructions in the book