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You don't have a return statement.


Change to:
public static int aSalary(int sales) {
if (sales <= 0){
return 0;
} else {
return (int)((double)(sales) * 0.09 + 200); // java does not...

Problems:
0. When you post code, please use the "CODE" tags.

1. You make a reference to a variable outside of your current scope.


2. Your class does not contain a constructor, which is okay...