At a car dealership, Joe earns a base salary of $400 per week plus a 15% commission on all sales he makes each week. Last week, Joe had $45,000 in total sales. What would Joe's commission be for the week?
$340
$7,150
$6,750
$60
Joe's commission is calculated by multiplying his total sales by the commission rate:
Commission = Total Sales * Commission Rate
The commission rate is 15%, which can be written as 0.15.
Commission = $45,000 * 0.15 = $6,750.
Therefore, Joe's commission for the week would be $6,750. Answer: $\boxed{6,750}$.