A, B and C are three positive numbers such that the average of three-fifth of A and 30% of B is 13.5, and the average of $\frac{3}{8}$ times of B and 25% of C is 15. If A is equal to $\frac{5}{12}$ times of C, then the sum of all three numbers A, B and is:

125 135 145 120

125