diy.py

with open(r"c:\Users\shinelon\Desktop\sales_list.txt",'r',encoding='utf-8')as file:
    a=file.readlines()
for i in a:
    data=i.split()
    sum=0
    for sales in data[1:]:
        sum=sum+int(sales)
    a=data[0]+" "+str(sum)
    print(a)