Codechef Problem :13

 https://www.codechef.com/JUNE20B/problems/PRICECON

for _ in range(int(input())):

    n,k=input().split()

    n=int(n)

    k=int(k)

    a=[int(i) for i in input().split()]

    sum1=0

    for i in a:

        if i>k:

            sum1=sum1+(i-k)

    print(sum1)