save project

diy.py

 with open(r'c:\Users\mayi\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as file1:
     a=file1.readlines()
     #print(type(a[3:5]))
+final_sum=[]
 for i in a:
     #print(i)
     b=i.split()
@@ -8,6 +9,9 @@ for i in a:
     #print(b[1:])
     sum=0
     for sales in b[1:]:
-        sum=sum+int(sales)
-    result=b[0]+str(sum)
-    print(result)
\ No newline at end of file
+        sum=sum+int(sales)      
+        result=b[0]+str(sum)+'\n'
+    final_sum.append(result)
+
+with open(r'c:\Users\mayi\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8')as file1:
+    file1.writelines(final_sum)
\ No newline at end of file