单选题 An investor wants to purchase a small office building and gets the following information:

Gross potential rental income	$250000
Estimated vacancy and collection loss rate	5%
Insurance	$10000
Taxes	$8000
Utilities	$7000
Maintenance	$15000

Assume the investor purchases the building for $1850000, putting down 20% cash and financing the remainder with a long-term mortgage at a rate of 10%. The annual payments on the mortgage are $156997, and the interest portion is fully deductible for income tax purposes. The investor's marginal income tax rate is 28%. Depreciation per year, using the straight-line method, is estimated to be $45000 per year. The after-tax cash flow for the first year is closest to:
A. $197500
B. $3924,3
C. $38991