Help w/ M.B. DNA - Concentration on DNA in ug/ul (Sep/30/2008 )

I'm an "old" dog trying to learn new things in molecular biology - it's going slow.....If I have A260 of 0.350 and 5ul of stock DNA w/995 HOH, how do I find the concentration of DNA in ug/ml? I'm thinking: 0.350x50xD.F. = 0.350x50x200=3500ug/ml, but then change to ug/ml = 3.5 ug/ul. Am I calculating this right? Signed ...I'm too old for this

Good job!