Sexist Salary System

#include<stdio.h>
#include <ctype.h>

int main(void)
{

    int Salary, Years_Service;
    char Sex, Qualification;

    Sex = Qualification = '\0';
    Salary = Years_Service = 0;

    printf("Enter Gender: [M/F] ");
    scanf("%c",&Sex);

    printf("Enter Qualification: [G/P] ");
    scanf(" %c",&Qualification);

    printf("Enter Years_Service: ");
    scanf(" %d",&Years_Service);

    Sex = (char)tolower((int)Sex);
    Qualification = (char)tolower((int)Qualification);

    if (Sex == 'm') {
        if (Years_Service >= 10) {
            if (Qualification == 'p' ) {
                Salary=15000;
            } else if (Qualification == 'g' ) {
                Salary=10000;
            }
        } else if( Years_Service >= 0) {
            if (Qualification == 'p' ) {
                Salary=7000;
            } else if (Qualification == 'g' ) {
                Salary=7000;
            }
        }
    } else if (Sex == 'F' || Sex == 'f') {
        if (Years_Service >= 10) {
            if (Qualification == 'p' ) {
                Salary=12000;
            } else if (Qualification == 'g' ) {
                Salary=9000;
            }
        } else if( Years_Service >= 0) {
            if (Qualification == 'p' ) {
                Salary=10000;
            } else if (Qualification == 'g' ) {
                Salary=6000;
            }
        }
    }

    printf("The expected Salary will be: %d \n ", Salary);

}