The total amount of oranges and mandarins in a warehouse is 50 tons. 7\% of the oranges and 8\% of the mandarins have rotted. The total amount of rotted oranges and mandarins is 3.8 tons.
Accordingly, how many tons of sound oranges are in the warehouse?
A) 17.5
B) 17.6
C) 18
D) 17
E) 18.6