Baby formula is a non-trivial expense the first year of your kid’s life – it’s a $1,733.75 expense, by one calculation. That’s before you add up ancillary costs, like the expected increase in doctor’s visits that formula-fed babies are proven to incur. Another calculation found that the nation as a whole could save $13 billion a year in medical costs if all babies were breastfed. If you partner’s breastfeeding, maybe knowing how much she’s saving will make her nipples feel better.