Answer:
$4,000
Step-by-step explanation:
He makes a flat rate of $900, plus 10% on sales over $5,000
He sold $36,000, so he gets paid on $36,000 - $5,000 = $31,000 of those sales.
10% of $31,000 is
$31,000(0.10) = $3,100
He made $900 + $3,100 = $4,000
