Mark asks your advice about whether to continue a mail-order part of his business. Mail-order transactions generate extra cash sales of $40,000. These transactions require deductible cash expenses of $28,000, non-deductible cash expenses of $8,000, 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. $1,900 d. $2,800 e. $4,900 b. ($3,100) c. $4,300