For a family of 4 in CA with 2 kids in college, AGI of 250k, federal tax of 40k, non retirement savings of 200k, total family contribution at Princeton is estimated at 34k. The grant amount is 43, 520.
If only one child in college, family contribution is 62, 800 with a grant amount of 14, 720.
People can tinker with the numbers. Higher tax amount will increase the grant. More savings will decrease it (in the first scenario, increasing savings to 500, 000 increases family contribution to 43,500).
ETA: no loans in a Princeton FA package.