diy.py

with open(r'C:\Users\14576\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file1:
    a = file1.readlines()
    for b in a:
        new_c=0
        c = b.split()
        for d in c[1:]:
            new_c+=int(d)
        print(new_c)