Assuming a 21 percent marginal tax rate, compute the after-tax cost of the following business expenses a. $6,800 premium on business property and casualty insurance. b. $2,400 fine paid for business entertainment. c. $4,900 premium on key-person life insurance. d. $62,000 political contribution. e. $9,000 client meals. a. b. C. d. e. After-tax cost After-tax cost After-tax cost After-tax cost After-tax cost