Answer:
$4500
Explanation:
You want to know the commission on a $75000 sale if it is 5% on the first $50000 and 8% of the amount over $50000.
Commission
The amount of commission is found by multiplying the commission rate by the applicable sale amount. For a sale amount x such that x > $50,000, the commission is ...
C = 0.05(50000) +0.08(x -50000) = 0.08x -0.03(50000)
C = 0.08x -1500
The commission on a sale of 75000 would be ...
C = 0.08(75000) -1500 = 6000 -1500 = 4500
Your commission is $4500.