A customer has a debit card that gives monthly cash back bonuses. If the customer spends from $10.00 to $499.99, he earns 1% cash back. If he spends $500.00 to $999.99, he earns 2% cash back. For monthly purchases of $1,000.00 and more, he earns a 3% cash back bonus. His monthly purchases for the past 6 months are as follows: $345.00, $592.00, $609.00, $280.00, $1,020.00, and $452.00. How much did he earn in cash back bonuses over the past six months (rounded to the nearest cent)? a$10.99 b$65.39 c$65.96 d$549.67