#include<iostream> #include<iomanip> using namespace std; int main(){ double a,b,c,d,e,f,g,h,i,j,k,l; cin >>a>>b>>c>>d>>e>>f>>g>>h>>i>>j>>k>>l; double s; s = (a+b+c+d+e+f+g+h+i+j+k+l)/12.0; cout <<"￥"<<fixed<<setprecision(2)<<s; }