import java.util.Scanner

object Main {
  def main(args: Array[String]) {
    val result = solve(new Scanner(System.in))
    if (result.length > 0) println(result)
  }

  def solve(in: String): String = solve(new Scanner(in))

  def solve(sc: Scanner): String = {
    val N = sc.nextInt
    val xu = Array.fill(N)(sc.next, sc.next)

    xu.map {
      case (x, "JPY") => x.toInt
      case (x, _) => x.toDouble * 380000
    }.sum.toString
  }
}
