The nontaxable amount of the $6,000 Roth conversion will be $6,000 * $6,000 / ($95,000 + $6,000) = $356.44 and the taxable amount will the $6,000 - $356.44 = $5,643.56. $5,643.56 of your basis in nondeductible traditional IRA contributions will remain in your traditional IRAs to be applied to future distributions.
