Can I get two different rebates for the same Trend Micro product?

I recently purchased Trend Micro Internet Security Pro from Office Depot. It was advertised to have a $40 and then a $30 upgrade rebate(meaning I owned the previous version of the product and can get a rebate for that) from the same company. The terms were on the back of the receipt but I thougt it may have loopholes or may be interpreted differently. I was wondering if I can take advantage of both rebates or if I can only get one of those rebates. Should I mail them in the same envelope since they go to the same address and require the original of the receipt and the same and only UPC? If any of you know about this rebate, your answer would be greatly appreciated. Thank you! Serious answers please. Please pardon any typos.