another question on bankroll

using the hi-lo with i18 on a 6 deck shoe,doa das s17 could you tell me what specific bet spread,on which counts,and specific bankroll size i would need for $5 minimums.i have no problem with the playing and counting aspect but my math seriously sucks.if there is a simple formula,notice i said simple,that i could just input bet size for specific ror, that might help too.ive been counting for years and know for a fact have been overbetting,i need serious help with figuring bankroll and betting strategy for a good risk of ruin.