Answer:
$18.00
Explanation:
1. Your friend has $17.91.
2. Your cousin has $0.10 more than your friend. We can add $0.10 to your friend's amount to find out your cousin's total: $17.91 + $0.10 = $18.01.
3. You have $0.01 less than your cousin. We can subtract $0.01 from your cousin's amount to find out how much money you have: $18.01 - $0.01 = $18.00