Aladdin and Jasmine

Aladdin wants to marry princess Jasmine but The Sultan gives a task to him which checks the mathematical computational skill of Aladdin. Sultan gives Aladdin coins of having values ranging from $low$ to $high$. And there are exactly $N$ coins of each value. Now Sultan asks Aladdin in how many ways he can arrange exactly $N$ coins in a row such that sum of all coins results into a even number. Alad