Insurance comparison

public class InsuranceComparison {
    public static void main(String[] args) {
        // Fill in variables below with values given in instructions.
        int davidMonthly = 0;
        int davidYearly = 0;
        int goliathMonthly = 0;
        int goliathYearly = 0;
        int goliathSixMonths = 0;
        int goliathYearlyDiscount = 0;
        // Do not edit anything below this line.
        int davidYearlyWithTax = davidYearly + (davidYearly / 10);
        if (davidYearlyWithTax < goliathSixMonths) {
            System.out.println("Choose David's insurance!");
        } else if (davidYearlyWithTax == goliathSixMonths) {
            System.out.println("Choose either insurance company.");
        } else if (davidYearlyWithTax > goliathSixMonths &&
                davidYearlyWithTax < goliathYearlyDiscount) {
            System.out.println("Choose Goliath's insurance!");
        } else if (davidY