text: function task(arr) {
      arr = arr.map(Number);
      let [climbers, carabiners, ropes, pickeys] = arr;
  
      let total = climbers * ((carabiners * 36) + (ropes * 3.60) + (pickeys * 19.80));
  
      let finalTotal = total + (total * 0.2);
  
      console.log(finalTotal.toFixed(2));
  }
  
  
  task([
          '20',
          '14',
          '30',
          '6'
      ]
  );