8475.009765625 3721.89990234375
3455

my answer is :
17925655.52
2916 539


for
8475.00 3721.89
3455
i have the answer
17925621.65
2916 539

First answer is correct (I mean, my program that is AC, gives the same result :))

Answer for 2nd test should look like this:
17925621.71
2916 539

Probably you have some rounding problems (in your answer two digits after decimal point are incorrect).