#include <bits/stdc++.h>
using namespace std;
using LL = long long;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<LL>;
using VVL = vector<VL>;
using VD = vector<double>;
using VVD = vector<VD>;
using PII = pair<int, int>;
using PDD = pair<double, double>;
using PLL = pair<LL, LL>;
using VPII = vector<PII>;
template <typename T>
using VT = vector<T>;
template <typename T>
inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T>
inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
const int INF = 1e9;
const int MOD = INF + 7;
const LL LLINF = 1e18;
const int MAX = 1111;
int n, A, B, C, T;
int t[MAX];
int main(void) {
  scanf("%d%d%d%d%d", &n, &A, &B, &C, &T);
  for (int(i) = 0; (i) < (n); (i)++) scanf("%d", t + i);
  LL ans = 0;
  for (int(i) = 0; (i) < (n); (i)++) {
    if (C - B > 0) {
      ans += A + (C - B) * (T - t[i]);
    } else {
      ans += A;
    }
  }
  cout << ans << endl;
}
