There are separate columns for 2 ADULTS (1 WORKING) and 2 ADULTS (BOTH WORKING). I think you are mixing up the two.
And the non-working adult is taking care of children, so reducing childcare expenses.
I am not mixing up the 2
First row, for https://livingwage.mit.edu/counties/06075
| 1 adult | 2 adults (1 working) | | 0 Children | 1 Child | 2 Children | 3 Children | 0 Children |1 Child | 2 Children | 3 Children | | $29.31 | $61.37 | $83.72 | $107.95 | $41.83 | $50.47 | $54.77 | $63.97 | 1 adult + 0 children = $29.31 2 adults + 0 children = $41.83
1 adult + 3 kids = $107.95 2 adults + 3 kids = $63.97
I am not mixing up the 2
First row, for https://livingwage.mit.edu/counties/06075
The only way these numbers make sense if if you assume one income. Then Given the first example was one income, this 2nd one makes no sense. 5 people cost more than 4. These numbers are wrong.