Q3 Ratios - Work Time Wages | EA and GMAT Quant Practice Question

The given question is a medium difficulty EA / GMAT problem solving question in ratios. Concept tested is how to divide wages among two or more people who work at different rates, but work together to complete the job. Two core ideas are discussed and are crucial to solving EA / GMAT questions that test this concept. Question A, B, and C each working alone can complete a job in 6, 8, and 12 days respectively. If all three of them work together to complete a job and earn $2340, what will be C's share of the earnings? A. $1100 B. $520 C. $1080 D. $1170 E. $630