The correct formula to calculate the target sales to achieve a certain net profit after tax is: Select one: a. { (\$Fixed Costs + \$Target Profit before tax )(1 tax rate)\} / CM ratio b. (\$Fixed Costs + (\$T Target Profit before tax) / CM ratio (1 tax rate) C. (\$Fixed Costs + \$T Target Profit before tax ) / CM ratio (1tax rate) d. (\$Fixed Costs + (\$T) Profit before tax (1 tax rate) / CM ratio