Bob gets paid an annual salary of $30,000 and earns 5% commission on all sales he makes. If Bob wants to make $6,000 this month, how much in sales does he need to have?

Bob’s monthly salary is $30,000 ÷ 12 = $2,500. To earn $6,000 this month, he needs $6,000 − $2,500 = $3,500 in commission. Since commission is 5% of sales, the required sales are $3,500 ÷ 0.05 = $70,000. The correct choice is $70,000.

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