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P6-8A. Net Income Planning Superior Corporation sells a single product for \$75 per unit, of which $42 is contribution margin. Fixed costs total $100,800 and net income before income tax is $28.800. Required Defermine the following (show key computations): a. The present sales volume in dollars. b. The break-even point in units. c. The sales volume in units necessary to attain a net income before income tax of $39,000. d. The sales volume in units necessary to attain a net income before income tax cqual to 20% of sales revenue. e. The sales volume in units neceesary to attain an after-tax net income of $43,720 if the tax rate is 4058 . P6-8A. Net Income Planning Superior Corporation sells a single product for \$75 per unit, of which $42 is contribution margin. Fixed costs total $100,800 and net income before income tax is $28.800. Required Defermine the following (show key computations): a. The present sales volume in dollars. b. The break-even point in units. c. The sales volume in units necessary to attain a net income before income tax of $39,000. d. The sales volume in units necessary to attain a net income before income tax cqual to 20% of sales revenue. e. The sales volume in units neceesary to attain an after-tax net income of $43,720 if the tax rate is 4058