Felix prepay's $165 for 11 months for the usage of the basketball courts and he paid $20 annual fee for 12 months
Explanation:
Total prepayment made by the Felix was $185
(Less) Annual fee $20 from $185
=

= 165 ÷ 15 = 11 (or)

Hence, Felix prepaid $165 for 11 months ( $15 for each month) towards to use the basketball courts and he paid $20 for 12 months( one year) towards Annual fee to the local recreation center.