Your realized income is $2,415.64/month, and 54% are discretionary monies. If you want to save 3 months of fixed expenses for an emergency fund, how much must you save each month to fund it in 8 months
. $2,415.64 x 46% = $1,111.194 -- this is the fixed expense per month. You need to save 3/8 of $1,111.194 each month, so save $416.70 per month.