Mia is a sales associate at an art gallery. Each week she earns $300 plus a 4% commission of all her sales. This week she earned $327. How much, in dollars, were Mia's art sales this week?

$327-$300(her base pay) is $27
Divide 27 by 4(the percentage) to get $6.75
$6.75 times 100 is $675
Mia sold $675 worth of art this week