function vacation(groupPeople, typeGroup, dayWeek) {
  const business = 'Business';
  const students = 'Students';
  const regular = 'Regular';

  const friday = 'Friday';
  const sunday = 'Sunday';
  const saturday = 'Saturday';

  let priceForOne = 0;

  if (dayWeek === friday) {
    if (typeGroup === students) {
      priceForOne = 8.45;
    } else if (typeGroup === business) {
      priceForOne = 10.90;
    } else if (typeGroup === regular) {
      priceForOne = 15;
    }
  } else if (dayWeek === saturday) {
    if (typeGroup === students) {
      priceForOne = 9.80;
    } else if (typeGroup === business) {
      priceForOne = 15.60;
    } else if (typeGroup === regular) {
      priceForOne = 20;
    }
  } else if (dayWeek === sunday) {
    if (typeGroup === students) {
      priceForOne = 10.46;
    } else if (typeGroup === business) {
      priceForOne = 16;
    } else if (typeGroup === regular) {
      priceForOne = 22.50;
    }
  }

  if (groupPeople >= 30 && typeGroup === students) {
    priceForOne *= 0.85;
  } else if (groupPeople >= 100 && typeGroup === business) {
    groupPeople -= 10;
  } else if (typeGroup === regular && groupPeople >= 10 && groupPeople <= 20) {
    priceForOne *= 0.95;
  }

  let totalPrice = priceForOne * groupPeople;

  console.log(`Total price: ${totalPrice.toFixed(2)}`);