auto save

demo.py

+with open(r'C:\Users\23636\Desktop\sales_list.txt','r',encoding='utf-8')as file1:
+    a=file1.readlines()
+final_sum=[]
+for i in a:
+    data=i.split()
+    sum1=0
+    for sales in data[1:]:
+        sum1 += int(sales)
+    result = data[0]+str(sum1)+'\n'
+    final_sum.append(result)
+with open(r'C:\Users\23636\Desktop\sales_list.txt','a',encoding='utf-8')as file1:
+    file1.writelines(final_sum)
\ No newline at end of file