Parents in New York City rolled their eyes at a recent survey that claimed it costs $15,447 a year to raise a child in the state, calculated over the course of 18 years. But families across the five boroughs told The Post that their annual bills far eclipse that, ranging from $19,000 to a shocking $100,000 per child.  The LendingTree study , published April 6, found that parents pay more than $300,000 to raise a child in the US over the course of 18 years. New York State was ranked at No.15 in the country with a total cost of $278,051 per child.  That boils down to an average of $15,447 a year.   “Oh, hell no!” Cinzia Leon slammed the survey, telling The Post that it was close to the price tag for just her son’s confirmation last year.   Cinzia Leon, owner of Moretti Bakery on Staten Island, shot down the financial stats in the survey. Olga Ginzburg for the N.Y. Post “Alone, the hall cost $12,000,” said the Staten Island mom of the 100-guest shindig.…