var num1;
 var num2;
 var num3;
 var num4;
 var num5;
 var num6;

$('input').on('change mouseup keyup', function(){
 num1 = document.getElementById("cigsPerDay").value;
 num2 = document.getElementById("cigsCost").value;
 num3 = document.getElementById("cigsInPack").value;
 
 num4 = document.getElementById("rolliesPerDay").value;
 num5 = document.getElementById("rolliesCost").value;
 num6 = document.getElementById("rolliesInPack").value;
 
  if(num1 =='' || num2=='' || num3==''){
    $("#calculate-cigarettes").addClass("disabled-button");
    $('.cig-result').each(function(){
    	$(this).html('');
    });
   
  } else{
    $("#calculate-cigarettes").removeClass("disabled-button");
  }
  
  if(num4 =='' || num5=='' || num6==''){
    $("#calculate-rollies").addClass("disabled-button");
    $('.rollies-result').each(function(){
    	$(this).html('');
    });
  } else{
    $("#calculate-rollies").removeClass("disabled-button");
  }
 });
 
function calculate()
{
        document.getElementById("result-year").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a year: </span>' + '$' + Math.trunc((num1 * 365) / num3 * num2) + '</p>';
        document.getElementById("result-month").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a month: </span>' + '$' + Math.trunc(((num1 * 365) / num3 * num2) / 12) + '</p>';
        document.getElementById("result-week").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a week: </span>' + '$' + Math.trunc(((num1 * 365) / num3 * num2) / 52) + '</p>';
}

function calculateRollies()
{
        
        document.getElementById("result-year-rollies").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a year: </span>' + '$' + Math.trunc((num4 * 365) / num6 * num5) + '</p>';
        document.getElementById("result-month-rollies").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a month: </span>' + '$' + Math.trunc(((num4 * 365) / num6 * num5) / 12) + '</p>';
        document.getElementById("result-week-rollies").innerHTML = '<p class="calculation-result">' + '<span class="result-type">Savings after a week: </span>' + '$' + Math.trunc(((num4 * 365) / num6 * num5) / 52) + '</p>';
}