A customer has a debit card that gives monthly cash back bonuses. If the customer spends from $10 to $499.99 he earns 1% cash back. If he spends $500 to $999.99 he earns 2% cash back. For monthly purchases of $1000 and more, he earns a 3% cash back bones. His monthly purchases for the past 6 months are as follows: $345, $609. $280, 1020 and $45. How much did he earn in cash bonuses over the past six months?

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