save project

diy.py

 with open(r'C:\Users\123\Documents\lesson13-1\sales_list.txt','r',encoding='utf-8') as file:
     a=file.readlines()
+    final_sum=[]
     for i in a:
         data=i.split()
         sum=0
         for sales in data[1:]:
             sum=sum+int(sales)
-        result=data[0]+str(sum)
-        print(result)
+        result = data[0]+str(sum)+'\n'
+        final_sum.append(result)
+with open(r'C:\Users\123\Documents\lesson13-1\new_salelist.txt','r',encoding='utf-8') as file:
+    file.writelines(final_sum)