Mattel uses two steps to make a toy. Step 1 takes 30 seconds. Step 2 takes 20 seconds. Each step is staffed by one worker, for a total of two workers. Each worker is paid $15 per hour. Each toy is sold for $20. Material costs are $5 per toy and fixed costs are $500 per hour. Demand rate is 90 toys per hour. How much profit does Mattel make per hour? Assume the worker's pay is a variable cost. A. $860.6 B. $820.3 C. $720.4 D. $950.5