GMAT question of the day

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Type: Problem Solving

Difficulty: 2 star rating

Rosanne works at a car dealership. She earns a base salary plus a 12.5 percent commission on the amount her total sales for the week exceed $2,000. If Rosanne's total salary including commission was $1,200 in a week when her total sales were $8,400 then what is her base salary?

$150
$300
$400
$800
$1,050