Mark asks your advice about whether to continue a mail-order part of his business. Mail-order transactions generate extra cash sales of $54,000. These transactions require deductible cash expenses of $28,000, nondeductible cash expenses of $10,000, and deductible non-cash expenses of $5,000. What is Mark's after-tax cash flow from these operations if his marginal tax rate is 30% ? A. $4,700 B. $11,200 C. $6,300 D. $9,700 E. $12,700 F. $14,700