Mine have always been very low.
I don't have daycare expences, now they are past that age but when they were younger I worked while they were in school so I have never had daycare expences with work.
My work attire is jeans/shorts and t-shirts so aside from my job being rough on clothes and having to replace them more often no added expence there.
I take my lunch to work so no added expence there.
I only work about 3 miles from home so gas is not much of an issue, plus on the way home I pick my DD3 up from school so if I were not working then I would have to make that trip anyway so that cancels out some of the gas that I do use.
I don't buy anymore convience foods then I would if I were not working.
I guess someone may have $20-$30,000 of work expences that are talked about in those cost comparisons but I don't see it happening for the average person. One exception may be paying daycare for multiple kids and in a high cost area.