My version

對於在去年迎來一位家庭新成員的中等收入美國家庭而言，未來17年裏，他們花在這個孩子身上的花費可能是近30萬美元。

For those American middle-class families who had a newborn baby last year, the cost of raising their child in the coming 17 years will be approximately US$300,000.