21. Last year, Lenny's Lemonade had $3,500 in sales, and cost of goods sold was $2,000. Depreciation expenses totaled S500 and interest expense was $700. If the tax rate is 25%, what is the net profit margin for Lenny's Lemonade? What is its NOPAT margin? a. 6.43% and 21.43% b, 20.7% and 21.43% c, 2.14% and 32.14% d. 22.86% and 32.14%