Cost difference of Admiral vs Target mutual funds from Vanguard

Cost of Vanguard Target funds: 0.15% or $150 per $100k

Cost of 4-fund approach through Vanguard Admiral funds: (53.8*0.04 + 36.1*0.11 + 7.1*0.05 + 3*0.11)*100000/(100*100) or $68 per $100k

Total savings: $82 per $100k.