def inp(): return int(input())
def strng(): return input().strip()
def jn(x, l): return x.join(map(str, l))
def strl(): return list(input().strip())
def mul(): return map(int, input().strip().split())
def mulf(): return map(float, input().strip().split())
def seq(): return list(map(int, input().strip().split()))
def ceil(x): return int(x) if(x == int(x)) else int(x)+1
def ceildiv(x, d): return x//d if(x % d == 0) else x//d+1
for i in range(inp()):
n,a,b = mul()
lst = seq()
l =[]
l.append(sum(lst)*b)
m = []
s1 =sum(lst)
a1=0
for i in range(0,n):
m.append(s1-lst[i]-a1)
a1+=lst[i]
for i in range(0,n):
c1 = (lst[i]-0)*b+((i+1-n)*lst[i]+m[i])*b
c2=a*(lst[i]-0)
if l[0]>(c1+c2):
l[0]=c1+c2
print(l[0])
#include<bits/stdc++.h>
#define ll long long
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define repin rep(i,0,n)
#define di(a) ll a;cin>>a;
#define sin string s;cin>>s;
#define dia di(a)
#define dib di(b)
#define dic di(c)
#define dix di(x)
#define diy di(y)
#define diz di(z)
#define dik di(k)
#define din di(n)
#define dim di(m)
#define diq di(q)
#define endl '\n'
#define precise(i) cout<<fixed<<setprecision(i)
#define V vector<ll>
#define pb push_back
#define M map<ll,ll>
#define take(a,n) for(int j=0;j<n;j++) cin>>a[j];
#define give(a,n) for(int j=0;j<n;j++) cout<<a[j]<<' ';
#define vpii vector<pair<ll,ll>>
#define all(x) x.begin(),x.end()
#define back(x) x.rbegin(),x.rend()
#define MOD 1000000007
#define db long double
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
// const int N =998244353;
int main(){
fastio;
ll T=1;
cin>>T;
// int ogt=0;
while(T--){
// ogt++;
din;
dia;
dib;
V v(n);
take(v,n);
ll ans = b*v[0];
ll curr =0;
if(a<b*(n-1)) {
ans += a*v[0];
curr=v[0];
}
for (int i = 1; i < n; ++i)
{
if(a<b*(n-1-i)){
ans += (b+a)*(v[i]-curr);
curr=v[i];
}
else {
ans += b*(v[i]-curr);
}
}
cout<<ans<<endl;
}
return 0;
} 702C - Cellular Network | 1672C - Unequal Array |
1706C - Qpwoeirut And The City | 1697A - Parkway Walk |
1505B - DMCA | 478B - Random Teams |
1705C - Mark and His Unfinished Essay | 1401C - Mere Array |
1613B - Absent Remainder | 1536B - Prinzessin der Verurteilung |
1699B - Almost Ternary Matrix | 1545A - AquaMoon and Strange Sort |
538B - Quasi Binary | 424A - Squats |
1703A - YES or YES | 494A - Treasure |
48B - Land Lot | 835A - Key races |
1622C - Set or Decrease | 1682A - Palindromic Indices |
903C - Boxes Packing | 887A - Div 64 |
755B - PolandBall and Game | 808B - Average Sleep Time |
1515E - Phoenix and Computers | 1552B - Running for Gold |
994A - Fingerprints | 1221C - Perfect Team |
1709C - Recover an RBS | 378A - Playing with Dice |