diy.py

with open(r'c:\Users\玛酷001\Documents\lesson13-4\sales_list.txt','r',encoding='utf-8') as file:
    a=file.readlines()
    print(type(a))
    for i in a:
        data=i.split()
        print(data)
        sum=0
    for sales in data[1:]:
        sum=sum+int(sales)
    result=data[0]+str(sum)
    print(result)