import sys

input = sys.stdin.buffer.readline
mod = 10 ** 9 + 7

t = int(input())

from collections import defaultdict

for _ in range(t):
    n = int(input())
    A = list(map(int, input().split()))
    pre = defaultdict(int)
    pre[0] = 1
    for a in A:
        nx = defaultdict(int)
        for num in pre.keys():
            cnt = pre[num]
            nx[num] = cnt
            nx[(num + a) % mod] = cnt
        pre = nx
    ans = 0
    for key, val in pre.items():
        ans += key * val
        ans %= mod
    print(ans)