After reading this and other legal forums for nearly a decade, I've had a spreadsheet of my daughter's expenses and receipts for kid-specific stuff at the ready every time I go into court. I've never needed to use it.
It's remarkable how expensive kids are, though!
OMG, I could not even imagine detailing WHAT is have spent on boy child.
$3.00 for a box of gum (SPD input)
$0.50 because he wanted a gumball and I needed him to keep quiet
$5.00 per month for allowance - because.... well he did some chores but he also needed it for lunches over summer camps
$800.00 for a new laptop because the old one is dying but, well, we share it, sort of
etc
etc
I don't even want to go into trying to split the household expenses since we have 2 parenting plans. I could divide the mortgage by 5 but boy is here 99% of the time (no, Dad does not see boy by his own choice) but hubby's boys are here 6 out of 14 nights. So how is a fair way to split it all up? And then there are the variable bills like power, heat, food, etc etc
I would simply invite my ex to try and sift through figuring out the days/nights and who eats more vs who uses more shampoo...