Congrats on getting off the waitlist. A lot of people don’t understand what “meets need” means. Colleges look at families’ income and assets and use those to determine what their expected contribution is. If Yale costs $72k and they’ve determined your EFC is $40k, your need would be $32k.
Did you have a change in financial circumstances this year? Did comparable school’s offer more? If so, you can ask Yale to review your aid.