The Department of Education's College Scorecard for BU[1] suggests relatively few given the reported $30,395 average annual cost figure, which is described as:

> The average annual net price that a student who receives federal financial aid pays to cover expenses (e.g., tuition, living expenses) to attend a school. Net price is the school's cost of attendance minus any grants and scholarships received. For public schools, this is only the average cost for in-state students.

In comparison, Stanford's reported average annual cost[2] is $12,894. This makes sense given its student responsibility[3].

[1] https://collegescorecard.ed.gov/school/?164988-Boston-Univer...

[2] https://collegescorecard.ed.gov/school/?243744-Stanford-Univ...

[3] https://financialaid.stanford.edu/undergrad/how/student.html