save project

a.py

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