Select the option that is related to the fourth number in the same way as the first number is related to the second number and the fifth number is related to the sixth number.
68 : 4 : : ? : 7 : : 220 : 6
The sum of the salaries of three persons, A, B and C, is βΉ66,500. B's salary is half the salary of C. B's salary is 125% of A's salary. What is the salary of C?