Mine is something like $60 for first phone and $10 for second phone plus $30 data for first phone. Total around $100 plus fees and taxes. That's for 700 minutes.
With the new account level billing you will see a charge for the account, which includes the bulk of the Family Share plan cost, and then charges broken out for each line (the $9.99 fee, plus any add-ons like data or texting packages). If you add up your bill, you'll find that it comes out to the published price for a plan with two lines.