save project

diy.py

-with open(r'c:\Users\win10\Documents\lesson13-1\sales_list.txt','w',encoding='utf-8') as f:
+with open(r'c:\Users\win10\Documents\lesson13-3\sales_list.txt','r',encoding='utf-8') as f:
     a=f.readlines()
-    for i in a:
-        str.split(str=")
\ No newline at end of file
+for i in a:
+    # data=i.split()
+    # print(data[0])
+    # print(data[1:])
+    for sales in data:
+        sum=sum+int(sales)
+        result=data[0]+str(sum)
+    print(result)
\ No newline at end of file