function calcHourlyRoom() {
  var type   = document.getElementById('roomType').value;
  var hours  = Number(document.getElementById('roomHours').value);
  var day    = document.getElementById('roomDay').value;
  var air    = document.getElementById('roomAircon').value;
  var profit = Number(document.getElementById('roomProfit').value);

  // 1時間あたり料金
  var hourlyFee = 0;

  if (type === 'rehearsal')      hourlyFee = 1830;
  if (type === 'practice1')      hourlyFee = 300;
  if (type === 'practice2')      hourlyFee = 210;
  if (type === 'practice3')      hourlyFee = 400;
  if (type === 'exhibition')     hourlyFee = 950;
  if (type === 'training1')      hourlyFee = 460;
  if (type === 'training2')      hourlyFee = 700;
  if (type === 'avroom')         hourlyFee = 460;
  if (type === 'japaneseroom')   hourlyFee = 310;
  if (type === 'meeting')        hourlyFee = 810;
  if (type === 'specialmeeting') hourlyFee = 1570;

  // 基本料金（時間数を掛ける）
  var base = hourlyFee * hours;

  // 土日祝 2割増
  var addHoliday = (day === 'holiday') ? Math.round(base * 0.2) : 0;

  // 空調 5割増
  var addAircon = (air === 'yes') ? Math.round(base * 0.5) : 0;

  // 営利割増（基本料金から）
  var addProfit = Math.round(base * profit);

  var finalFee = base + addHoliday + addAircon + addProfit;

  // 最終結果だけ10円単位で切り捨て
  finalFee = Math.floor(finalFee / 10) * 10;

  document.getElementById('roomResult').innerText = finalFee.toLocaleString();
}