Donation Comparison Challenge

A school decided to organize a special event where students can collect donations for a local charity. Each student is encouraged to reach a donation goal from their family and friends.

Bobby managed to collect $87 from his relatives and $92 from his friends. Sarah collected $63 from her relatives and $45 from her friends.

If both students want to know how much more Sarah needs in total to match Bobby's total donations, what amount would that be?