We're due in 3 months... and New Years planning has gotten the better of me. How much do you reckon a baby costs per month? I'm talking nappies, formula (if I can't breast feed) wipes, classes...?! Hard ask I know but do people budget a monthly amount? I reckon we'll have most of the big items (buggy, car seat, nursery stuff etc) sorted beforehand so really just the monthly running costs...!!