save project

diy.py

 with open(r'c:\Users\Administrator\Desktop\sales_list.txt','r',encoding='utf-8')as file:
     a=file.readlines()
+c=[]
 for i in a: 
     data=i.split()
     sum=0
+    
     for sales in data[1:]:
         sum=sum+int(sales)
-        a=data[0]+str(sum)
-    print(a)
+    a=data[0]+str(sum)+"\n"
+    c.append(a)
+with open(r'c:\Users\Administrator\Desktop\new_sales_list.txt','a',encoding='utf-8')as file:
+    file.writelines(c)