This has been running for a few weeks in Staples. It is also in next weeks ad too.
Add a pack of gum then use the 10 off 30 purchase and 20 rebate to get it free.
Price 29.98
Candy .65
Less $10.00 from 10 off $30.00 deal
Less $20.00 mail in rebate
Final Price Tax only on $30.00 purchase