• qualiti-related expenses,
• quality-relates expenses,
• qulity-related expenses,
• qualty-related expenses,
• quality-releated expenses,
• quality-related expences,
• qualit-related expenses,
• quality-relatd expenses,
• quality-related exepnses,
• qualitie-related expenses

The adjective form of the phrase "quality-related expenses" is "quality-related".

The plural form of the word "quality-related expenses" is "quality-related expenses." The word "expenses" already indicates that there is more than one expense.

The singular form of the word "quality-related expenses" is "quality-related expense".