Question 1121252
A is x
B is 1.2x
For C the profit is 1.2*0.04*x=0.048x, so from A to C is 1.248x

The wording isn't clear but if C paid 624, that represents 1.248 x.
Dividing by 1.248 x, the original cost was 500 rs.

B paid 600 and C paid 624