Lilliput College Grades

import java.util.Scanner;

public class LilliputCollegeGrades {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int presence, finalTest, midTest, hwGrade;
        float grade;
        String str = "Final Grade is: ";
        System.out.println("Please enter presence in percentage: ");
        presence = s.nextInt();
        if(presence < 80) {
            grade = 0; // Student presence is less the 80%
        } else {
            System.out.println("Please enter grade of final test: ");
            finalTest = s.nextInt();
            if(finalTest < 60) {
                grade = finalTest; // Grade on final test is less than 60
            } else {
                System.out.println("Please enter grade of mid test: ");
                midTest = s.nextInt();
                System.out.println("Please enter homework assignments average grade: ");
                hwGrade = s.nextInt();
                // Calculating if mid test is under consideration
                grade = finalTest > midTest ? finalTest : finalTest * 0.8f + midTest * 0.2f;
                // Calculating hw assignment influence on the final grade
                grade = grade * 0.9f + hwGrade * 0.1f;
            }
        }
        System.out.println("Final Grade is: " + grade);
    }
}