Answer:
$69
Explanation:
First, we want to focus on the first $300
Multiply 300 by 0.05 to get the commission
300 x 0.05 = 15
Now, we solve for the first 300, let's solve for the remaining sales, which is 600 because 900 - 300 = 600
Multiply 600 by 0.09
600 x 0.09 = 54
Add the two sales commission numbers together
15 + 54 = 69