def resolve():
    n = int(input())
    s = 0
    for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
    print(s)
resolve() def resolve():
    n = int(input())
    s = 0
    for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
    print(s) resolve n = int(input()) n int(input()) int input() input s = 0 s 0 for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
     _ range(n) range n x, u = input().split() x input().split() ().split () input split u if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
     u == 'BTC' u 'BTC' s += float(x) * 380000 s float(x) * 380000 float(x) float x 380000 s += float(x) * 1 s float(x) * 1 float(x) float x 1 print(s) print s resolve() resolve def resolve():
    n = int(input())
    s = 0
    for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
    print(s) def resolve():
    n = int(input())
    s = 0
    for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
    print(s) resolve
def resolve():
    n = int(input())
    s = 0
    for _ in range(n):
        x, u = input().split()
        if u == 'BTC':
            s += float(x) * 380000
        else:
            s += float(x) * 1
    print(s)
resolve()