If it costs middle-income families approximately $222,360 to raise a child to age 18, but wealthy families pay more and lower-income families less, what additional or fewer items are these other...

If it costs middle-income families approximately $222,360 to raise a child to age 18, but wealthy families pay more and lower-income families less, what additional or fewer items are these other children receiving? Are the items extras? Are they necessities?