Trouble with using Scanner methods nextInt() and nextLine() Together

I am using Scanner methods nextInt() and nextLine() for reading input.

I want my program to work for two inputs

Input 1:

10000 A

Output 1:

17600

 Input 2:
 
 10000
 
 A

Output 2:

17600

This Code is working for Input 1 only and giving Error in Input 2  After I Enter 10000. It is not taking A in next Line And executing program before taking A in Input 2. I want this program to work on both type of inputs.
how can i do that?

    import java.util.Scanner;
    
    public class Main {
    
    	public static void main(String[] args) {
    		Scanner s = new Scanner(System.in);
    		int sal = s.nextInt();
    		
    
    
    		double hra = sal*20.0/100;
    		double da = sal*50.0/100;
    		double pf = sal*11.0/100;
    		String str = s.nextLine();
    		char c = str.charAt(0);
    		int allow = 0;
    		if(c=='A') {
    			 allow = 1700;
    		}else if(c=='B') {
    			allow = 1500;
    		}else {allow = 1300;}
             double t = Math.round(sal + hra + da + allow - pf);
    		 int ts = (int)t;
    		 System.out.println(ts);
    
    	}
    
    }

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