Melissa (single) bought her first home in June 2008 for $165,000. She received $7,500 (the maximum available for the First-Time Homebuyer Credit). She has not sold the home and is not eligible for any special treatment due to military service. Her first repayment was in 2010. Assuming she has not made extra payments, how much has she repaid prior to filing her 2021 return?

$4,000

$4,500

$5,500

$7,500