Yesterday, we all worked on ranking the most expensive private schools that New Yorkers send their kids to. Through emails, comments and a bit of research (thanks, lazyweb!), we think we now know the truth!

Riverdale: $33,100.

Dalton: $31,200.

Fieldston (Ethical Culture): $30,440. (Updated!)

Trinity: $30,170.

Brearley: $29,700.

Sacred Heart: $29,500.

Trevor Day School: $29,400.

Hewitt: $29,100.

Spence: $28,000.

Brooklyn Friends: $27,400. (Just added!)

Horace Mann: $27,350.

Chapin: $27,300.

Collegiate: $27,100.

Masters: $26,000. (Plus board, add $10K.)

Berkeley Carroll: $26,000. (Just added!)

Rye Country Day: $25,650.

UN International School: $24,250. (Just added!)

St. Ann's: $24,000.

Dwight: $24,000.

Packer Collegiate: $23,550.

York Prep: $23,000.

Nightingale-Bamford: $23,000.

French-American School: $22,200.

Geneva: $17,500.

Manhattan School for Girls: $15,500.

Fordham Prep: $11,360.

Updates and corrections welcome by email and comment!