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;
} 1176A - Divide it | 1527A - And Then There Were K |
1618E - Singers' Tour | 1560B - Who's Opposite |
182B - Vasya's Calendar | 934A - A Compatible Pair |
1618F - Reverse | 1684C - Column Swapping |
57C - Array | 1713D - Tournament Countdown |
33A - What is for dinner | 810A - Straight A |
1433C - Dominant Piranha | 633A - Ebony and Ivory |
1196A - Three Piles of Candies | 299A - Ksusha and Array |
448B - Suffix Structures | 1092B - Teams Forming |
1166C - A Tale of Two Lands | 544B - Sea and Islands |
152B - Steps | 1174D - Ehab and the Expected XOR Problem |
1511A - Review Site | 1316A - Grade Allocation |
838A - Binary Blocks | 1515D - Phoenix and Socks |
1624D - Palindromes Coloring | 1552F - Telepanting |
1692G - 2Sort | 1191A - Tokitsukaze and Enhancement |