"use strict";
function I(s,f){this._s=s.split("\n");this._c=0;this._l=0;this._f=f||Number}I.prototype.a=function(){var l=this._s[this._l];if(!l)return;var t=l.trim().split(" ");var a=t[this._c];this._c++;if(t.length===this._c){this._c=0;this._l++}return this._f(a)};I.prototype.l=function(){var l=this._s[this._l];if(!l)return;this._c=0;this._l++;return l.split(" ").map(this._f)};module.exports=I;

function main(input) {
  const o = new I(input, String);

  const N = Number(o.a());
  const BTC = 380000.0;

  let x = [];
  let u = [];

  let sum = 0;
  for (let i = 0; i < N; i++) {
    let x = Number(o.a());
    let u = o.a();

    if (u === "JPY") {
      sum += x;
    } else {
      sum += BTC * x;
    }
  }

  console.log(sum)
}


main(require("fs").readFileSync("/dev/stdin", "utf8"));
