sample2.js

function myFunction() {
  
  var response = UrlFetchApp.fetch("https://so2-api.mutoys.com/json/sale/all.json");
  
  var json = JSON.parse(response.getContentText());
  
  var n = 0;
  
  while(1){
    try{
      var item = json[n]["item_id"];
      var area = json[n]["area_id"];
      
      if(item == 106){
        if(area == 2){
          var p = json[n]["price"];
          var u = json[n]["unit"];
          Logger.log(p + "," + u);
        }
      }
      n++;
    }
    catch(e){
      break;
    }
  }
}