save project

aa.py

 with open(r"C:\Users\Administrator\Desktop\sales_list.txt","r",encoding="utf-8")as file:
     a=file.readlines()
+fu=[]
 for i in a:
     data=i.split()
     sum=0
     for s in data[1:]:
         sum=sum+int(s)
-    d=data[0]+str(sum)
-    print(d)   
\ No newline at end of file
+    d=data[0]+str(sum)+'\n'
+    fu.append(d)
+with open(r"C:\Users\Administrator\Desktop\sales_list.txt","w",encoding="utf-8")as file:
+      file.writelines(fu)
+       
\ No newline at end of file