save project

diy.py

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