Pete earns graduated commission on his sales each month. He earns 7% commission on the first $35,000 in sales and 9% on anything over that. If Pete had $43,000 in sales this month, how much commission did he earn?

Pete earns 7% on the first $35,000: 0.07 × $35,000 = $2,450. The remaining $8,000 earns 9%: 0.09 × $8,000 = $720. Adding the commissions gives $2,450 + $720 = $3,170, so the correct choice is $3,170.

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