save project

diy.py

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