I am assuming that W is weeks, but however if you do the math on each one it doesn't equal 111, or it doesn't make sense. The first one doesn't make sense because why would 6 dollars and 45 dollars equal 111 weeks. The next one isn't a proper equation for this problem. The 3rd one is the exact opposite of the 4th one but neither of them add up to 111. So it has to be E.