Scott earns $10 per hour for babysitting and $30 per hour for computer repair work. Which inequality represents how many hours Scott could babysit, b, and how many hours he could do computer work, c, to earn a total of at least $600 this month? A. 10b + 30c > 600
 B. 10b +30C 600 
C. 40(b+c)2 600
 D. 40(b+c) 5600 E. 
Do Not Know