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
