Dear Steve, Good Afternoon.
While I am waiting for your answer, I developed a model to you as a suggestion.
Here is the link: http://www.4shared.com/document/4jX6...r_SUM_MrM.html
Take a look at it and tell me if it worked for you.
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I hope it can help you.
Best regards,
Marcilio Lobão
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Belo Horizonte, Brazil
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