Work study is not a grant – the student must find a job (usually an on-campus job or eligible non-profit organization) and work to earn that money. Having work study means that the student will be preferred over non work study students by eligible employers.
Therefore, in the example in #9, the net price is $22,000 per year ($30,000 list price - $5,000 scholarship - $3,000 Pell grant), not $20,000 per year.