package eco;

public class Wheat {

    public static int tWheat;
    public static int wheatPrice;
    public static int unemployedFarmers = 0;
    public static int employedFarmers = 0;

    public static int farmPacks(int tAcres) {

        int farmPacks = tAcres/5;
        return farmPacks;

    }

    public static int unemployedFarmers(int farmPacks, int fPop) {

        unemployedFarmers = fPop - farmPacks;

        if(unemployedFarmers < 0) {
            unemployedFarmers = 0;
        }

        return unemployedFarmers;

    }

    public static int employedFarmers(int fPop, int unemployedFarmers) {

        employedFarmers = (fPop - unemployedFarmers);
        return employedFarmers;

    }

    public static int tWheat(int employedFarmers) {

        tWheat = employedFarmers * 40;
        return tWheat;

    }

}

package eco;

public class Wheat {

    public static int tWheat;
    public static int wheatPrice;
    
    public static int wheatPerFarmer = 50;
   
   
   /**/ public static int unemployedFarmers = 0;
   /**/  public static int employedFarmers = 0;

   /**/  public static int farmPacks(int tAcres) {

       /**/  int farmPacks = tAcres/5;
        /**/ return farmPacks;

     /**/}

    /**/ public static int unemployedFarmers(int farmPacks, int fPop) {

       /**/  unemployedFarmers = fPop - farmPacks;

         /**/if(unemployedFarmers < 0) {
          /**/   unemployedFarmers = 0;
         /**/}

         /**/return unemployedFarmers;

    /**/ }

    /**/ public static int employedFarmers(int fPop, int unemployedFarmers) {

         /**/employedFarmers = (fPop - unemployedFarmers);
        /**/ return employedFarmers;

     /**/}

    public static int tWheat(int farmers) {
        tWheat = farmers * wheatPerFarmer;
        return tWheat;
    }

}

Update Wheat.java