Help with the below math word question

Question

In 3 years sales person A earned twice as much as sales person B who in turn has averaged 50% more than sales person C.  The 3 combined to make 220,000.00 over the 3 years. How much did sales B earn in an average on any year.

Answer 1

a=2b, b=1.5c

a+b+c=200,000/3=66,666.66$

3c+1.5c+c=66,666.66

5.5c=66,666.66

c=12,121.21$

b=1.5c=18,181.82