My son spends 50% of his time with me & 50% of his time with his dad. My son's dad pays me child support with a 30% reduction based on having him half the time. We do not have a shared expense plan, just c/s. I have my son every Wed & Thurs, then every other weekend Fri through Mon morning. Dad has him Mon & Tues, then every other weekend beginning Friday morning. I pay for our son's school enrollment and my son's dad tells me I have to also pay for his school breakfast & lunches since he pays me child support. I've been considering sending a lunch with my son on the days I have him since he has shown some precursor signs of type 2 diabetes and the doctor told us school lunches are not that good for kids that need to watch what they eat. If I do that, do I still have to pay for the lunches my son eats at school on his dad's days if he doesn't take a lunch on those days? I struggle to find what exactly c/s pays for and what should be split between us. Medical I know is split it is always spelled out, but what about all those other expenses?