e) None of the above 10. Royal Corp's sales last year were $560,000, and its net income was $46,000. What was its profit margin? 5 points O a) 7.41% O b) 7.80% O c) 8.216 d) 8.63% O e None of the above 1. What's the present value of a perpetulty that pays $300 per year if the