auto save

diy.py

+with open(r'c:\Users\MC3-06\Desktop\niubi.txt','r',encoding="utf-8") as file:
+    a = file.readlines()
+for i in range(3):
+        for i in a:
+            sum = 0
+            data=i .split()
+        for x in data[1:]:
+            sum = sum+int(x)
+        print(sum)
\ No newline at end of file

sales_list.txt

+with open(r'c:\Users\MC3-06\Desktop\niubi.txt','r',encoding="utf-8") as file:
+    a = file.readlines()
+    for i in a:
+    sum=0
+    data=i .split()
+    for x in data[1:]:
+    sum = sum+x
+print(sum)
\ No newline at end of file